| Patent Number |
Title Of Patent |
Date Issued |
| 4941982 |
Calcium-free clear high density fluids |
July 17, 1990 |
| Clear high density fluids for use as completion, packing and perforation media in oil and gas well formations having high carbonate and/or high sulfate ion concentration are formulated from aqueous solutions of zinc bromide and one or more alkali metal bromides and have densities lying i |
| 4936910 |
Process for the recovery of gold |
June 26, 1990 |
| Process for recovering gold from a leachate containing AuBr.sub.4.sup.-- comprising contacting the leachate with a quantity of sphagnum peat moss under conditions effective to concentrate the gold on the moss, and thereafter recovering the gold from the sphagnum peat moss. |
| 4935153 |
Method for the control of biofouling in recirculating water systems |
June 19, 1990 |
| A method of controlling biofouling in an aqueous system comprising introducing into the system a biocidally effective amount of a water soluble perhalide of the formula: ##STR1## where R.sub.1 and R.sub.2 are hydrogen, hydroxyethyl, alkyl, cyclic alkyl, (alpha, omega)-alkyl, alky |
| 4925866 |
Method for controlling plant diseases and microoganisms in the presence of plants |
May 15, 1990 |
| The present invention is directed to a novel method for controlling the growth of microorganisms on, in or near plants. more particularly, in one embodiment, growth of microorganisms is controlled on a surface that is in such proximity to a higher order plant that contacting such surface |
| 4898975 |
Water soluble organic ammonium per halides |
February 6, 1990 |
| Water soluble biocidal water treatment perhalides of the formula: ##STR1## where R.sub.1 and R.sub.2 are independently hydrogen, hydroxyethyl, alkyl, cyclic alkyl, (alpha, omega)-alkyl, alkyl ether, polyether, heterocyclic ring-substituted alkyl, and halogenated alkyl; X is chlorine, |
| 4892892 |
Flame retardant polyurethane foam compositions containing polynuclearbrominated alkylbenzene |
January 9, 1990 |
| Flame retardant polyurethane foam compositions incorporate an effective amount of a polybrominated higher alkylbenzene as a flame retardant and, optionally, a polyaryl phosphate agent. |
| 4891449 |
Halogenated unsymmetrical higher alkyl phenoxy alkanes |
January 2, 1990 |
| Halogenated unsymmetrical higher alkyl bisphenoxy alkanes having utility as non-blooming flame retardant agents. |
| 4886915 |
Water soluble organic ammonium per halides |
December 12, 1989 |
| Water soluble biocidal water treatment perhalides of the formula: ##STR1## where R.sub.1 and R.sub.2 are independently hydrogen, hydroxyethyl, alkyl, cyclic alkyl, (alpha, omega)-alkyl, alkyl ether, polyether, heterocyclic ring-substituted alkyl, and halogenated alkyl; X is chlorine, |
| 4886543 |
Cryoprotectant composition |
December 12, 1989 |
| Aqueous plant cryoprotectant composition containing between about 0.005 and 25 wt. % tetrahydrofurfuryl alcohol, tetrahydrofurfuryl amine or mixtures thereof and method of increasing the resistance of plant tissue to damage caused by freezing conditions comprising applying to the plant t |
| 4880862 |
Flame retardant ABS resin composition |
November 14, 1989 |
| Flame retardant ABS compositions incorporate an effective amount of halogenated unsymmetrical higher alkyl bisphenoxy alkane and an enhancing agent. |
| 4879353 |
Bromination of polystyrene using bromine as the reaction solvent |
November 7, 1989 |
| A process for the bromination of polystyrenic homo- and co-polymers using bromine as the reaction medium, bromine chloride as the bromination reagent and a Lewis acid catalyst substantially improves product quality and permits controlling the reaction to achieve a desired level of br |
| 4835322 |
Process for producing 4,4'-dibromodiphenyl ether |
May 30, 1989 |
| 4,4'-dibromodiphenyl ether may be obtained in high yield and purity by the uncatalyzed "neat" bromination of diphenyl oxide, followed by methanol digestion. |
| 4832873 |
Process for producing polybrominated higher alkylbenzenes |
May 23, 1989 |
| Polybrominated higher alkylbenzenes may be produced by reacting the corresponding hydrocarbon material with bromine chloride in an excess bromine reaction medium in the presence of an antimony halide catalyst. |
| 4831072 |
Flame retardant MPPE resin compositions |
May 16, 1989 |
| Flame retardant MPPE compositions incorporate an effective amount of a polybrominated higher alkylbenzene or mixture thereof as a flame retardant and flow modifier together with an enhancing agent. |
| 4829118 |
Flame retardant ABS resin compositions |
May 9, 1989 |
| Flame retardant ABS compositions incorporate an effective amount of a polybrominated higher alkylbenzene or mixture thereof and an enhancing agent. |
| 4804484 |
Antifloc additives for sodium bromide compositions |
February 14, 1989 |
| Solid sodium bromide and aqueous sodium bromide solutions incorporate sodium tartrate and one or more amides of nitrolotriacetic acid in order to inhibit floc formation in aqueous sodium bromide solutions in the pH range 6-12 and in order to insure that the solid sodium bromide is free |
| 4780496 |
Flame retardant thermoplastic polyolefin compositions |
October 25, 1988 |
| Normally combustible thermoplastic polyolefins such as polystyrene and polypropylene may be flame retarded without discoloration utilizing a flame retardant additive mixture comprising hexabromocyclododecane and one or more bis-(polybromophenoxy)ethane. |
| 4760014 |
Method for treating mixtures containing photopolymeric resin and compositions therefor |
July 26, 1988 |
| A process for treating an aqueous alkaline spent mixture produced during preparation of circuit boards and comprising a photopolymer resin. According to the method, first, an acid, a polyvalent cation and a coagulation aid are mixed with the spent mixture to produce a heterogeneous t |
| 4754053 |
Process for preparing alkyl tetrabromophthalates |
June 28, 1988 |
| Bis(2-ethyl-1-hexyl) tetrabromophthalate produced by the reaction of tetrabromophthalic anhydride with 2-ethyl-1-hexanol in the presence of titanium isopropoxide catalyst may be purified by contacting the reaction mixture with sodium carbonate decahydrate with agitation for a time and at |
| 4732396 |
Apparatus and method for sealing a rotating shaft |
March 22, 1988 |
| An apparatus and method for forming a fluid-tight seal at an aperture where a rotatable shaft passes through a barrier into a barred fluid. A mechanical seal is mounted on the rotatable shaft. A stationary portion of the mechanical seal is elastomerically joined to the barrier by an |
| 4696963 |
Halogenated alkyl phosphate esters and polymer systems incorporating them |
September 29, 1987 |
| Flame retardant non-mutagenic halogenated alkyl phosphate ester mixture of the formula: ##STR1## and flame retardant polymer systems incorporating such mixtures. |
| 4677130 |
Process of densification of N-halohydantoin compositions and products thereof |
June 30, 1987 |
| The present invention is directed to a novel process for manufacturing tablets of N-halohydantoin compounds. In the process, at least one dry, particulate N-halohydantoin compound is blended with a dry, particulate alkali metal or alkaline earth salt to form a dry mixture, and the mixtur |
| 4637865 |
Process for metal recovery and compositions useful therein |
January 20, 1987 |
| A process for extracting a precious metal or base metal from a source material containing the metal. The process comprises contacting the source material with an aqueous leaching solution containing a leaching agent comprising an N-halohydantoin compound, thereby producing an aqueous |
| 4636282 |
Method for etching copper and composition useful therein |
January 13, 1987 |
| A composition of matter comprising sulfuric acid and guanidine, aminoguanidine, or formylated aminoguanidine. The composition is useful in the preparation of sulfuric acid/hydrogen peroxide etching solutions and in methods for etching copper, most particularly in the manufacture of p |
| 4621096 |
Densified halogenated dimethylhydantoins |
November 4, 1986 |
| Halogenated dimethylhydantoins are intimately mixed with calcium chloride and water and compressed to provide a densified particulate solid that is capable of withstanding the stresses of automatic packaging, conveying and handling. |
| 4567218 |
Halogenated bisphenol A ether flame retardant for ABS polymers |
January 28, 1986 |
| There is disclosed a flame-retarded acrylonitrile-butadiene-styrene composition containing from about 5 to about 35 percent (by weight) bis(2,4,6-tribromophenoxyethyl) tetrabromobisphenol A ether and a method for forming such a composition. |
| 4532330 |
Process for producing densified halogenated dimethylhydantoins |
July 30, 1985 |
| Halogenated dimethylhydantoins are intimately mixed wth calcium chloride and water and compressed to provide a densified particulate solid that is capable of withstanding the stresses of automatic packaging, conveying and handling. |
| 4481296 |
Color indicator system for pH measurement |
November 6, 1984 |
| A composition comprising phenol red, phenol, and deionized water and preferably sodium hydroxide and citric acid and a method for measuring pH wherein such composition is added to a water sample. |
| 4349488 |
Process for producing esters of 3,5-dibromo-4-hydroxybenzonitrile |
September 14, 1982 |
| 2,6-dibromo-4-cyanophenyl octanoates and other esters of 3,5-dibromo-4-hydroxybenzonitrile may be produced by reacting 4-hydroxybenzonitrile with bromine in the presence of an inert solvent and catalytic amounts of a basic heterocyclic aromatic compound or its hydrohalide, followed b |
| 4345002 |
Novel intumescent composition and flame retardant articles treated therewith |
August 17, 1982 |
| An intumescent composition containing a cyclic nitrogen compound, a hydroxy-containing organo-phosphorus compound, an organo-phosphorus acid, and water, wherein:(a) said cyclic nitrogen compound is: ##STR1## wherein a, b, and c, are integers selected from the group consisting of 1 |
| 4341890 |
Poly(brominated phenylene oxide) and flame-retarded high impact polystyrene composition |
July 27, 1982 |
| A flame-retarded polystyrene composition which does not bloom comprising at least about 50 percent (by combined weight of polystyrene, poly[brominated phenylene oxide], and enhancing agent) of high impact polystyrene, from about 9 to about 22 percent (by weight) of poly(brominated phenyl |
| 4339357 |
Intumescent composition |
July 13, 1982 |
| A compound of the formula ##STR1## wherein a, b, c, d, and n are integers; a is from 1 to 3; b and c are independently selected from the group consisting of 0 and 1; d and n are independently selected from the group consisting of 1 and 2; R.sup.1 and R.sup.4 are independently sel |
| 4327227 |
Process for producing purified brominated aromatic compounds |
April 27, 1982 |
| Highly purified brominated aromatic compounds such as decabromodiphenyl ether, pentabromophenol, and the like may be obtained by grinding the crude brominated product to provide particles predominantly less than about 20 microns in diameter and thereafter heating the crude ground bro |
| 4297224 |
Method for the control of biofouling in recirculating water systems |
October 27, 1981 |
| Biofouling in recirculating water systems may be controlled by admixing or otherwise providing 1-bromo-3-chloro-5, 5-dimethylhydantoin ("BCDMH") to the water at a level effective to control biological film-forming organisms and thereafter maintaining the BCDMH concentration at a level |
| 4292183 |
High-density fluid compositions |
September 29, 1981 |
| Clear, high-density fluids suitable for use as well completion, packing, and perforation media comprise aqueous solutions of zinc bromide and calcium bromide having densities lying in the range of about 14.5 up to about 18.0 pounds per gallon and measured pH's lying in the range of about |
| 4287373 |
Perbromination of phenol and diphenyl ether at elevated temperature using bromine as the reactio |
September 1, 1981 |
| A process for the perbromination of phenol and diphenyl ether by brominating the corresponding compound in bromine as the sole reaction medium using metal and metal-containing catalysts at an elevated initial reaction temperature of at least about 35.degree. C., preferably at least a |
| 4214103 |
Purification of brominated organic products |
July 22, 1980 |
| Crude halogenated organic products, especially products consisting of partially halogenated diphenyl ethers alone or in admixture with other materials may be purified by contacting the crude brominated product with a finely divided basic solid such as a carbonate or bicarbonate of an |
| 4160112 |
Process for the isolation of pentabromophenol |
July 3, 1979 |
| A process for isolating crude pentabromophenol containing occluded bromine and hydrogen bromide as impurities comprising the steps of contacting the crude pentabromophenol with a strong acid such as hydrobromic acid, sulfuric acid, hydrochloric acid and phosphoric acid; heating the mixtu |
| 4089912 |
Stabilized flame-retardant styrenic polymer compositions and the stabilizing flame-retardant mix |
May 16, 1978 |
| This application discloses stabilized flame-retardant styrenic polymer compositions comprising a bromine-containing flame-retardant, antimony trioxide and a three component stabilizer comprising a dialkyltin maleate, a hindered phenolic antioxidant, and a member selected from the group |
| 4083942 |
Process for producing metal bromides |
April 11, 1978 |
| Alkali and alkaline earth metal bromides may be prepared by reacting a basic compound of an alkali or alkaline earth metal with a reducing agent in the presence of water and thereafter adding thereto stepwise alternate incremental portions of bromine and the basic compound while maintain |
| 4078089 |
Thixotropic fumigant compositions containing liquid haloaliphatic hydrocarbon |
March 7, 1978 |
| Thixotropic fumigant compositions comprising liquid haloaliphatic hydrocarbon based fumigants and silica gelling agents may be stabilized through the use of an epoxide stabilizing agent and by controlling the purity of the raw materials such that the haloaliphatic hydrocarbon contain |
| 3932542 |
Process for preparation of 2,5-dibromo-p-xylene |
January 13, 1976 |
| Selective bromination process for 2,5-dibromo-p-xylene which comprises bromination of p-xylene using approximately stoichiometric amounts of bromine and a hydrated iron containing bromination catalyst to give selectively high yields of substantially pure 2,5-dibromo-p-xylene. |
| 3931274 |
Bis(2,3-dibromopropyl carbonates) of tetrahalobisphenol A |
January 6, 1976 |
| The compounds bis(2,3-dibromopropyl carbonate) of tetrabromobisphenol A and bis(2,3-dibromopropyl carbonate) of tetrachlorobisphenol A are effective fire retardants and impart enhanced fire-retardant properties to normally-combustible polymers by incorporation therein of a fire-retardant |
