| Patent Number |
Title Of Patent |
Date Issued |
| 5916358 |
Ink compositions containing surfactant sols comprising mixtures of solid surfactants |
June 29, 1999 |
| The invention is related to an aqueous ink composition comprising water, a coloring agent, and solid surfactant particles wherein said solid particles comprise a mixture of at least two surfactants with very low water solubility and with melting points between 40.degree. C. and 90.de |
| 5896155 |
Ink transfer printing apparatus with drop volume adjustment |
April 20, 1999 |
| A liquid ink, drop on demand page-width printhead comprises a semiconductor substrate, a plurality of drop-emitter nozzles fabricated on the substrate; an ink supply manifold coupled to the nozzles; pressure means for subjecting ink in the manifold to a pressure above ambient pressure |
| 5741633 |
Attachment of gelatin-grafted polymer particles to pre-precipitated silver halide grains |
April 21, 1998 |
| The invention describes silver halide packet emulsion grains or crystals that are conventionally precipitated using gelatin of a given isoelectric pH, surrounded by a layer of gelatin-grafted-polymer particles wherein the grafted gelatin has a different isoelectric pH and the said ge |
| 5726693 |
Ink printing apparatus using ink surfactants |
March 10, 1998 |
| A liquid ink, drop-on-demand pagewidth printhead including a semiconductor substrate, a plurality of drop-emitter nozzles fabricated on the substrate; an ink supply manifold coupled to the nozzles; pressure element for subjecting ink in the manifold to a pressure above ambient pressure; |
| 5716642 |
Microprecipitation of nanoparticulate pharmaceutical agents using surface active material derive |
February 10, 1998 |
| This invention describes the preparation of nanoparticulate pharmaceutical agent dispersion via a process that comprises the dissolution of the said pharmaceutical agent in an alkaline solution and then neutralizing the said solution with an acid in the presence of suitable surface-modif |
| 5693461 |
Mixed packet color photographic system |
December 2, 1997 |
| This invention describes the composition and method of preparation of heteroflocculated packet emulsion clusters containing a light sensitive and selectively photosensitized silver halide emulsion particles and particles of photographic agents such as dye-forming coupler particles. T |
| 5665331 |
Co-microprecipitation of nanoparticulate pharmaceutical agents with crystal growth modifiers |
September 9, 1997 |
| This invention describes the coprecipitation of nanoparticulate pharmaceutical agent dispersion via a process that comprises the dissolution of the said pharmaceutical agent in combination with a crystal growth modifier (CGM) in an alkaline solution and then neutralizing the said sol |
| 5662883 |
Microprecipitation of micro-nanoparticulate pharmaceutical agents |
September 2, 1997 |
| It has been known that administration of pharmaceutical agents (both diagnostic and therapeutic) with poor water solubility in the form of particles less than 400 nm in diameter produces agent formulation with increased bioavailibility. Bioavailability being proportional to the surfa |
| 5610002 |
Photographic composition containing a thickening agent |
March 11, 1997 |
| This invention describes gelatin thickening compounds for photographic coating melts with the general structure: ##STR1## wherein: A is an aromatic or heteroaromatic group;X is SO.sub.3 M or CO.sub.2 MM is H or an alkali metal, ammonium or pyridinium ion; each R1 and R2 is independen |
| 5591568 |
High dye stability, high activity, low stain and low viscosity small particle yellow dispersion |
January 7, 1997 |
| This invention provides composition and method to overcome the very high viscosity of prior small-particle dispersions when admixed with gelatin in aqueous solution for coating a photographic film element.The invention is generally accomplished by the utilization of a second surfactant i |
| 5565309 |
Oxygen barrier coated photographic agent milled dispersion particles for enhanced dye-stability |
October 15, 1996 |
| The invention creates a selective oxygen barrier around individual coupler or other photographically active particles by surrounding each particle with a layer of water applicable oxygen barrier polymer such as polyvinyl alcohol (PVA), which will also act as a steric barrier to coalescen |
| 5560932 |
Microprecipitation of nanoparticulate pharmaceutical agents |
October 1, 1996 |
| This invention describes the preparation of nanoparticulate pharmaceutical agent dispersion via a process that comprises the dissolution of the said pharmaceutical agent in an alkaline solution and then neutralizing the said solution with an acid in the presence of a suitable surface |
| 5543283 |
Attachment of gelatin-grafted plymer particles to pre-precipitated silver halide grains |
August 6, 1996 |
| The invention describes silver halide packet emulsion grains or crystals that are conventionally precipitated using gelatin of a given isoelectric pH, surrounded by a layer of gelatin-grafted-polymer particles wherein the grafted gelatin has a different isoelectric pH and the said ge |
| 5536630 |
Use of acid processed ossein gelatin and chain-extended acid processed ossein gelatin as peptize |
July 16, 1996 |
| The invention provides a method of nucleating silver halide particles wherein said nucleation is carried out in the presence of acid processed ossein (APO) gelatin or chain-extended acid processed ossein (CE-APO) gelatin and the composition formed therefrom. |
| 5503972 |
Gelatin-grafted-polymer particles as peptizer for silver halide emulsions |
April 2, 1996 |
| This invention describes the use of gelatin-grafted-polymer particles as peptizers for the preparation of silver halide photographic emulsions, whereby the gelatin-grafted-polymer particles remain attached to the AgX crystals after preparation of the emulsions. In an embodiment of this |
| 5491052 |
Yellow layer for color photographic elements |
February 13, 1996 |
| It has been discovered that when polyalkylene oxide compounds or block polymeric or block oligomeric surface active compounds comprising at least a polyoxypropylene (POP) block and a polyoxyethylene (POE) block are added to conventional dispersions of yellow couplers (that is dispersions |
| 5441865 |
Gelatin-grafted-polymer particles as peptizer for silver halide emulsions |
August 15, 1995 |
| This invention describes the use of gelatin-grafted-polymer particles as peptizers for the preparation of silver halide photographic emulsions, whereby the gelatin-grafted-polymer particles remain attached to the AgX crystals after preparation of the emulsions. In an embodiment of this |
| 5426020 |
Pressure sensitivity relief for photographic products |
June 20, 1995 |
| This invention describes the use of surfactants of the following types:Type A--Surfactant comprising 6 to 22 carbon atom hydrophobic tail with one or more attached hydrophilic chains comprising at least 8 oxyethylene and/or glycidyl ether groups that may or may not be terminated with a n |
| 5399480 |
Attachment of gelatin-grafted polymer particles to pre-precipitated silver halide grains |
March 21, 1995 |
| The invention describes silver halide packet emulsion grains or crystals that are conventionally precipitated using gelatin of a given isoelectric pH, surrounded by a layer of gelatin-grafted-polymer particles wherein the grafted gelatin has a different isoelectric pH and the said ge |
| 5397695 |
Attachment of compounds to polymeric particles using carbamoylonium compounds and a kit containi |
March 14, 1995 |
| Useful materials for diagnostic tests, affinity chromatography, enzymatic reactions and immunoassays are prepared by covalently attaching reactive compounds containing reactive amino or sulfhydryl groups to polymeric particles having pendant carboxyl groups on the outer surfaces. Such |
| 5395748 |
Ballasted optical brighteners |
March 7, 1995 |
| An inexpensive, ballasted optical brightener for use in photographic elements is prepared by reacting an optical brightener of the formula ##STR1## where M is a cation; X is a group capable of undergoing nucleophilic displacement; and Z is ##STR2## or --O--R.sub.3, where each |
| 5393650 |
Pressure sensitivity relief for photographic products |
February 28, 1995 |
| This invention describes the use of surfactants of the following types:Type A--Surfactant comprising 6 to 22 carbon atom hydrophobic tail with one or more attached hydrophilic chains comprising at least 8 oxyethylene and/or glycidyl ether groups that may or may not be terminated with a n |
| 5385812 |
Continuous manufacture of gelled microprecipitated dispersion melts |
January 31, 1995 |
| The invention discloses a continuous method of manufacture of gelled dispersion melts of "small-particle" microprecipitated photographic agents. The continuous melt manufacturing process of this invention provides dispersion melts that are invariant in agent concentration, melt visco |
| 5378598 |
Use of acid processed ossein gelatin and chain-extened acid processed ossein gelatin as peptizer |
January 3, 1995 |
| The invention provides a method of nucleating silver halide particles wherein said nucleation is carried out in the presence of acid processed ossein (APO) gelatin or chain-extended acid processed ossein (CE-APO) gelatin and the composition formed therefrom. |
| 5370966 |
Surfactant dye-diffusion-transfer facilitating thermal solvents for image separation systems |
December 6, 1994 |
| The invention discloses an aqueous-developable chromogenic photographic heat-transferable non-aqueous dye-diffusion-transfer photographic element comprising radiation sensitive silver halide, a dye-providing compound that forms or releases a heat-transferable, image dye upon reaction of |
| 5366842 |
Oxygen barrier coated photographic coupler dispersion particles for enhanced dye-stability |
November 22, 1994 |
| The invention creates a selective oxygen barrier around individual coupler or other photographically active particles by surrounding each particle with a layer of water applicable oxygen barrier polymer such as polyvinyl alcohol (PVA), which will also act as a steric barrier to coalescen |
| 5358831 |
High dye stability, high activity, low stain and low viscosity small particle yellow dispersion |
October 25, 1994 |
| This invention provides composition and method to overcome the very high viscosity of prior small-particle dispersions when admixed with gelatin in aqueous solution for coating a photographic film element.The invention is generally accomplished by the utilization of a second surfactant i |
| 5318889 |
Use of chain-extended acid processed ossein gelatin in the preparation of photographic elements |
June 7, 1994 |
| This invention describes the advantages associated with the use of chain-extended acid processed ossein gelatin as the makeup gelatin, with emulsion precipitated in lime-processed ossein gelatin. Such photographic elements show a definite speed-fog advantage, compared to systems where |
| 5300418 |
Viscosity control of photographic melts |
April 5, 1994 |
| The invention relates to a melt for the coating of a layer in a photographic element and which contains water, gelatin and an anionically charged, hydrophobic group containing compound that is (a) water soluble or soluble in a solution of 5 to 20 percent of water miscible organic sol |
| 5279931 |
Polymer co-precipitated coupler dispersion |
January 18, 1994 |
| This invention describes a process of coprecipitating a photographic material such as a dye-forming coupler inside a base ionizable polymeric particle. Preparation of such a dispersion is performed by providing a first flow comprising a solution of a surfactant in water containing a |
| 5264317 |
Oxygen barrier coated photographic coupler dispersion particles for enhanced dye-stability |
November 23, 1993 |
| The invention creates a selective oxygen barrier around individual coupler or other photographically active particles by surrounding each particle with a layer of water applicable oxygen barrier polymer such as polyvinyl alcohol (PVA), which will also act as a steric barrier to coalescen |
| 5252425 |
Hard copy imaging system |
October 12, 1993 |
| This invention relates to a full-color hard copy imaging system and a process, where a multiply photosensitive donor sheet, comprising clear polymeric or an opaque paper base, coated sequentially with a first layer of patches of a cyan, a magenta, and a yellow dye, that are thermally |
| 5248558 |
Case-hardened gelatin-grafted polymer particles |
September 28, 1993 |
| It has been shown by Photon Correlation Spectroscopy than when additional hardener is added to below saturation gel-grafted polymer particles, the gel layer shrinks due to hardening, as there is no free gel left in solution. In films, such case-hardened gelatin-grafted soft polymer p |
| 5185230 |
Oxygen barrier coated photographic coupler dispersion particles for enhanced dye-stability |
February 9, 1993 |
| The invention creates a selective oxygen barrier around individual coupler or other photographically active particles by surrounding each particle with a layer of water applicable oxygen barrier polymer such as polyvinyl alcohol (PVA), which will also act as a steric barrier to coalescen |
| 5182189 |
Increased photographic activity precipitated coupler dispersions prepared by coprecipitation wit |
January 26, 1993 |
| Base and auxiliary solvent solubilized precipitated dispersions of couplers and other photographic materials usually produce very small particle dispersions, and usually such dispersions are extremely highly reactive because of the smallness of the particle size. However, some relatively |
| 5158863 |
Methods of forming stable dispersions of photographic materials |
October 27, 1992 |
| The invention is performed by providing a first flow of water and surfactant, a second flow comprising solvent, base and photographic material, and mixing said first and second streams and either simultaneously or immediately following thereof neutralizing said streams to prevent hyd |
| 5135844 |
Preparation of low viscosity small particle photographic dispersions in gelatin |
August 4, 1992 |
| The invention is generally accomplished by utilization of a surfactant for very small particle photographic dispersions. Three types of such surfactants that have been identified are as follows:Type A--Surfactant comprising 6 to 22 carbon atom hydrophobic tail with one or more attached h |
| 5104776 |
Increased photographic activity precipitated coupler dispersions prepared by coprecipitation wit |
April 14, 1992 |
| Base and auxiliary solvent solubilized precipitated dispersions of couplers and other photographic materials usually produce very small particle dispersions, and usually such dispersions are extremely highly reactive because of the smallness of the particle size. However, some relatively |
| 5091296 |
Polymer co-precipitated coupler dispersion |
February 25, 1992 |
| This invention describes a process of coprecipitating a photographic material such as a dye-forming coupler inside a base ionizable polymeric particle. Preparation of such a dispersion is performed by providing a first flow comprising a solution of a surfactant in water containing a |
| 5089380 |
Methods of preparation of precipitated coupler dispersions with increased photographic activity |
February 18, 1992 |
| Base and auxiliary solvent solubilized precipitated dispersions of couplers and other photographic materials usually produce very small particle dispersions, and usually such dispersions are extremely highly reactive because of the smallness of the particle size. However, some relatively |
| 5066572 |
Control of pressure-fog with gelatin-grafted and case-hardened gelatin-grafted soft polymer late |
November 19, 1991 |
| This invention describes a substantially less pressure sensitive photographic film comprising a support, at least one light sensitive silver halide element, and an overlaying element comprising gelatin-grafted or case-hardened gelatin-grafted soft polymer particle composite element. |
| 5055379 |
Photoresist dichromate composition containing gelatin coated particles |
October 8, 1991 |
| A negative-working photoresist composition comprising, in admixture, (a) dye-loaded or dye-precursor-loaded polymeric particles individually covered with a layer of gelatin that is covalently bonded thereto and (b) a radiation-sensitive dichromate is useful in the preparation of cont |
| 5026632 |
Use of gelatin-grafted and case-hardened gelatin-grafted polymer particles for relief from press |
June 25, 1991 |
| It has been shown by Photon Correlation Spectroscopy that when additional hardener is added to below saturation gel-grafted polymer particles, the gel layer shrinks due to hardening, as there is no free gel left in solution. In films, such case-hardened gelatin-grafted soft polymer p |
| 5013640 |
Preparation of low viscosity small-particle photographic dispersions in gelatin |
May 7, 1991 |
| The invention is generally accomplished by utilization of a surfactant for very small particle photographic dispersions. Three types of such surfactants that have been identified are as follows:Type A--Surfactant comprising 6 to 22 carbon atom hydrophobic tail with one or more attached h |
| 4990431 |
Methods of forming stable dispersions of photographic materials |
February 5, 1991 |
| The invention is performed by providing a first flow of water and surfactant, a second flow comprising solvent, base and photographic material, and mixing said first and second streams and either simultaneously or immediately following thereof neutralizing said streams to prevent hyd |
| 4970139 |
Methods of preparation of precipitated coupler dispersions with increased photographic activity |
November 13, 1990 |
| Base and auxiliary solvent solubilized precipitated dispersions of couplers and other photographic materials usually produce very small particle dispersions, and usually such dispersions are extremely highly reactive because of the smallness of the particle size. However, some relatively |
| 4933270 |
Process for the precipitation of stable colloidal dispersions of base degradable components of p |
June 12, 1990 |
| The invention provides a method of forming a dispersion of base degradable hydrophobic component for a photographic system. The invention is accomplished by mixing the component, solvent, and surfactant, at an elevated temperature if necessary, metering the mixture of solvent, surfac |
| 4920004 |
Gelatin-grafted polymer particles |
April 24, 1990 |
| There are disclosed polymer particles that are individually covered with gelatin that is covalently bonded thereto. The particles are useful in a variety of applications, such as photographic matting agents. |
| 4855219 |
Photographic element having polymer particles covalently bonded to gelatin |
August 8, 1989 |
| A photographic element comprising a support having thereon a gelatin-containing layer, and a matting agent comprising polymer particles covalently bonded to the gelatin in the layer. The polymer particles may be individually covered with gelatin that is covalently bonded thereto and |
