| Patent Number |
Title Of Patent |
Date Issued |
| RE36811 |
Solid phase extraction medium |
August 8, 2000 |
| A method for isolating an environmentally hazardous organic contaminant from a fluid utilizes a solid phase extraction medium comprises a PTFE fibril matrix, and sorptive particles enmeshed in said matrix comprising more than 30 and up to 100 weight percent of porous organic particles, a |
| 6365769 |
Perfluoroalkyl halides and derivatives |
April 2, 2002 |
| Novel mixtures of perfluoroalkyl halides and derivatives thereof are described. These mixtures contain some compounds with a straight perfluoroalkyl group and some with a branched perfluoroalkyl group. Methods of preparation and use are also described. |
| 6048952 |
Perfluoroalkyl halides and derivatives |
April 11, 2000 |
| Novel mixtures of perfluoroalkyl halides and derivatives thereof are described. These mixtures contain some compounds with a straight perfluoroalkyl group and some with a branched perfluoroalkyl group. Methods of preparation and use are also described. |
| 5993935 |
Covalently reactive particles incorporated in a continous porous matrix |
November 30, 1999 |
| A composite article is provided having covalently reactive particles incorporated in a continuous, porous matrix. The reactive particles have surfaces of covalently reactive functional groups capable of directly forming covalent chemical bonds with ligands without need for an interme |
| 5852148 |
Perfluoroalkyl halides and derivatives |
December 22, 1998 |
| Novel mixtures of perfluoroalkyl halides and derivatives thereof are described. These mixtures contain some compounds with a straight perfluoroalkyl group and some with a branched perfluoroalkyl group. Methods of preparation and use are also described. |
| 5738790 |
Composite membranes for solid phase extractions and reactions |
April 14, 1998 |
| A solid phase extraction or chromatographic medium comprises a porous nonwoven fibrous matrix comprising at least one of polytetrafluoroethylene and blown microfibers, and sorptive or reactive hydrophobic siliceous molecular sieve particulates enmeshed in said matrix, the ratio of mo |
| 5702610 |
Sheet materials for solid phase extractions and solid phase reactions |
December 30, 1997 |
| A sheet article for solid phase extraction or solid phase reaction comprises at least one sorptive polymer pulp, and optionally at least one of sorptive and reactive particulate. The article can be used in a method of separating an analyte from a fluid comprising the step of passing a |
| 5700375 |
Particle loaded membranes as oxidant scavengers |
December 23, 1997 |
| An efficient method removes oxidants from fluids (gases and liquids, particularly air) by means of solid phase extraction or reaction. The solid phase extraction or reaction medium comprises a porous, preferably fibrous, polymeric, membrane or web in which are incorporated oxidant sc |
| 5688370 |
Sheet materials for solid phase extractions and solid phase reactions |
November 18, 1997 |
| A sheet article for solid phase extraction or solid phase reaction has at least one sorptive polymer pulp at least one of sorptive and reactive particulate. The article can be used in a method of separating an analyte from a fluid by passing a fluid containing an analyte through a sheet |
| 5639372 |
Composite membranes for solid phase extractions and reactions |
June 17, 1997 |
| A solid phase extraction or chromatographic medium comprises a porous nonwoven fibrous matrix comprising at least one of polytetrafluoroethylene and blown microfibers, and sorptive or reactive hydrophobic siliceous molecular sieve particulates enmeshed in said matrix, the ratio of mo |
| 5635060 |
Composite membranes for solid phase extractions and reactions |
June 3, 1997 |
| A solid phase extraction or chromatographic medium comprises a porous nonwoven fibrous matrix comprising at least one of polytetrafluoroethylene and blown microfibers, and sorptive or reactive hydrophobic siliceous molecular sieve particulates enmeshed in said matrix, the ratio of mo |
| 5618438 |
Method of isolating an analyte using a solid phase extraction medium |
April 8, 1997 |
| A functionalized macroporous poly(styrene divinylbenzene) particle comprises at least one ionic functional group covalently bonded thereto, the functionalized particle having sorptive capability towards an analyte, said functional group being present in the range of 0.1 to 2.5 millie |
| 5616407 |
Self-wettable solid phase extraction medium |
April 1, 1997 |
| A functionalized macroporous poly(styrene divinylbenzene) particle comprises at least one ionic functional group covalently bonded thereto, the functionalized particle having sorptive capability towards an analyte, said functional group being present in the range of 0.1 to 2.5 millie |
| 5595649 |
Particle-loaded nonwoven fibrous article for separations and purifications |
January 21, 1997 |
| A particle loaded, porous, fibrous compressed or fused article comprises a nonwoven fibrous polymeric web, which preferably is thermoplastic, melt-extrudable, and pressure-fusible blown microfibrous web, and sorptive particles enmeshed in said web, the particle loaded fibrous article has |
| 5558771 |
Composite articles separating mercury from fluids |
September 24, 1996 |
| Composite articles are useful for separating mercury from fluids. The composite articles can be porous supports comprising an inert substrate having immobilized thereon finely divided gold optionally in combination with a tin salt coating. The porous support can be a particulate or porou |
| 5529686 |
Composite membranes for solid phase extractions and reactions |
June 25, 1996 |
| A solid phase extraction or chromatographic medium comprises a porous nonwoven fibrous matrix comprising at least one of polytetrafluoroethylene and blown microfibers, and sorptive or reactive hydrophobic siliceous molecular sieve particulates enmeshed in said matrix, the ratio of mo |
| 5507941 |
System for purifying saturated fluoroperhalocarbon liquids |
April 16, 1996 |
| A method of removing olefinic impurity, such as perfluoroisobutylene, from fluoroperhalocarbon liquid, such as perfluorinated liquid, comprising the step of contacting the fluoroperhalocarbon liquid with a body of particles comprising particles selected from the group consisting of alumi |
| 5492627 |
Method for separating mercury from fluids using composite articles |
February 20, 1996 |
| Composite articles are useful for separating mercury from fluids. The composite articles can be porous supports comprising an inert substrate having immobilized thereon finely divided gold optionally in combination with a tin salt coating. The porous support can be a particulate or porou |
| 5470532 |
Composite reactive articles for the determination of cyanide |
November 28, 1995 |
| Composite reactive articles are useful for quantifying cyanide ions in solution. The composite reactive articles can be porous reactive supports comprising an inert substrate having immobilized thereon finely divided gold. The porous reactive supports can be particulate, porous fibrous |
| 5415779 |
Particle-loaded nonwoven fibrous article for separations and purifications |
May 16, 1995 |
| A particle loaded, porous, fibrous compressed or fused article comprises a nonwoven fibrous polymeric web, which preferably is thermoplastic, melt-extrudable, and pressure-fusible blown microfibrous web, and sorptive particles enmeshed in said web, the particle loaded fibrous article has |
| 5403489 |
Solid phase extraction method and apparatus |
April 4, 1995 |
| A method and apparatus for performing solid phase extraction (SPE) on a fluid that contains solubles and suspended solids. The method includes: (a) providing a volume of fluid that contains solubles and suspended solids, (b) processing the volume of fluid to extract solubles therefrom |
| 5340746 |
Composite reactive articles for the determination of cyanide |
August 23, 1994 |
| Composite reactive articles are useful for quantifying cyanide ions in solution. The composite reactive articles can be porous reactive supports comprising an inert substrate having immobilized thereon finely divided gold. The porous reactive supports can be particulate, porous fibrous |
| 5328758 |
Particle-loaded nonwoven fibrous article for separations and purifications |
July 12, 1994 |
| A particle loaded, porous, fibrous compressed or fused article comprises a nonwoven fibrous polymeric web, which preferably is thermoplastic, melt-extrudable, and pressure-fusible blown microfibrous web, and sorptive particles enmeshed in said web, the particle loaded fibrous article has |
| 5300714 |
Method of purifying saturated fluoroperhalocarbon liquids |
April 5, 1994 |
| A method of removing olefinic impurity, such as perfluoroisobutylene, from fluoroperhalocarbon liquid, such as perfluorinated liquid, comprising the step of contacting the fluoroperhalocarbon liquid with a body of particles comprising particles selected from the group consisting of alumi |
| 5279742 |
Solid phase extraction medium |
January 18, 1994 |
| A method for isolating an environmentally hazardous organic contaminant from a fluid utilizes a solid phase extraction medium comprises a PTFE fibril matrix, and sorptive particles enmeshed in said matrix comprising more than 30 and up to 100 weight percent of porous organic particles, a |
| 5248428 |
Article for separations and purifications and method of controlling porosity therein |
September 28, 1993 |
| A composite article comprising, in the unexpanded form, a fibrillated PTFE matrix and a combination of energy expandable hollow polymeric particles and sorptive particles, which composite, on applying energy such as steam, heat, or laser energy, provides an expanded article having increa |
| 5238621 |
Method of controlling porosity in a composite article |
August 24, 1993 |
| A composite article comprising, in the unexpanded form, a fibrillated PTFE matrix and a combination of energy expandable hollow polymeric particles and sorptive particles, which composite, on applying energy such as steam, heat, or laser energy, provides an expanded article having increa |
| 5207915 |
Separation method using controlled pore composite polytetrafluoroethylene article |
May 4, 1993 |
| A composite article having controlled void volume and mean pore size comprises:(a) polytetrafluoroethylene (PTFE) fibril matrix, and(b) insoluble, non-swellable sorptive particles enmeshed in said matrix, the ratio of non-swellable sorptive particles to PTFE is in the range of 40:1 to 1: |
| 5147539 |
Controlled pore composite polytetrafluoroethylene article |
September 15, 1992 |
| A composite article having controlled void volume and mean pore size comprises:(a) polytetrafluoroethylene (PTFE) fibril matrix, and(b) insoluble, non-swellable sorptive particles enmeshed in said matrix, the ratio of non-swellable sorptive particles to PTFE is in the range of 40:1 to 1: |
| 5071610 |
Method of making a controlled pore composite polytetrafluoroethylene |
December 10, 1991 |
| A composite article having controlled void volume and mean pore size comprises:(a) polytetrafluoroethylene (PTFE) fibril matrix, and(b) insoluble, non-swellable sorptive particles enmeshed in said matrix, the ratio of non-swellable sorptive particles to PTFE is in the range of 40:1 to 1: |
| 5019232 |
Medium for electrophoresis |
May 28, 1991 |
| A medium for electrophoresis comprises:(a) a polytetrafluoroethylene (PTFE) fibril matrix, and(b) particulate, electrically mobile ions, and sufficient liquid in the interstitial spaces of said matrix to allow for ion transport,the ratio of said particulate to PTFE being in the range of 99:1 to |
| 4971736 |
Method of preparing composite chromatographic article |
November 20, 1990 |
| A composite chromatographic sheet-like article is prepared by the steps comprising blending one or more non-swellable sorptive hydrophobic particulate materials in the presence of an amount of polar organic masking agent sufficient to allow rapid wetting of the surface of the particu |
| 4906378 |
Composite chromatographic article |
March 6, 1990 |
| A composite chromatographic article comprising: (a) a polytetrafluoroethylene fibril matrix, and(b) non-swellable sorptive particles enmeshed in said matrix, the ratio of non-swellable sorptive particles to polytetrafluoroethylene being in the range of 19:1 to 4:1 by weight, said composi |
| 4810381 |
Composite chromatographic article |
March 7, 1989 |
| A composite chromatographic article comprising:(a) a polytetrafluoroethylene fibril matrix, and(b) non-swellable sorptive particles enmeshed in said matrix, the ration of non-swellable sorptive particles to polytetrafluoroethylene being in the range of 19:1 to 4:1 by weight, said composite a |
| 4532219 |
High frequency radiation-induced plasma analysis of volatile or non-volatile materials |
July 30, 1985 |
| An apparatus and method for analyzing a sample of an inorganic or organic material, wherein the sample is in a discharge tube within a plasma cavity interfaced to an analytical device and a high frequency-sustained radiation-induced excitation plasma is initiated and sustained in the |
