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| Number | Title | Issue Date |
| 6130303 | Water-soluble, highly branched polymeric microparticles Water-soluble, high molecular weight, polymeric, microparticles with a high degree of branching are disclosed. A microemulsion polymerization process for preparing the microparticles is also disclosed. The microparticles give excellent results in a number... | 10/10/2000 |
| 5756622 | Polymeric sulfide mineral depressants Novel depressants for depressing sulfide minerals during froth floatation of ores to recover value minerals are disclosed, as well as a method for their use in the froth flotation. The novel depressants are terpolymers of a (meth)acrylamide, an allyl thio... | 05/26/1998 |
| 5723548 | Emulsified mannich acrylamide polymers Mannich (alk)acrylamide microparticles are produced at high solids contents without a significant increase in bulk viscosity by inverse microemulsion polymerization and provide superior dewatering characteristics.... | 03/03/1998 |
| 5688403 | Removal of metal ions from solution Metal ions are removed from solution by contacting the solution with a combination of a water-soluble cationic polymer and a water-soluble polymer containing pendant hydroxamic acid or salt groups.... | 11/18/1997 |
| 5670615 | Quaternized tertiary aminomethyl acrylamide polymer microemulsions with improved performance Quaternized tertiary aminomethyl acrylamide polymer emulsions are treated by 1) adjusting the pH to about 3.6 to about 4.8, 2) adding a formaldehyde scavenger, 3) adjusting the water content of the aqueous phase to result in about 10-45 weight percent of ... | 09/23/1997 |
| 5658979 | Flash point stabilized tertiary aminomethylated (alk)acrylamide polymer microemulsions and method for the production thereof A microemulsion wherein the aqueous phase comprises a Mannich (alk)acrylamide-based polymer and contains a material effective so as to raise the Flash Point of the microemulsion to an acceptable value is disclosed in addition to a method for raising the F... | 08/19/1997 |
| 5643461 | High performance dewatering aids Water-soluble, branched, high molecular weight, cationic polymers are used in combination with low molecular weight, cationic polymers to provide the highly improved dewatering of suspended solids. Water-in-oil emulsions containing these cationic polymers... | 07/01/1997 |
| 5639433 | Extraction of rare earth elements using alkyl phosphinic acid or salt/alkyl or aryl phosphonic acid or ester blends as extractant A method is disclosed whereby rare earth elements are extracted from acidic solutions thereof using, as an extractant, a mixture of an alkyl (C4 -C12) phosphinic acid or salt and an alkyl (C4 -C12) or aryl phosp... | 06/17/1997 |
| 5622679 | Extraction of rare earth elements using alkyl phosphinic acid or salt/tetraalkylammonium salt as extractant A method whereby rare earth elements are extracted from acidic solutions thereof using, as an extractant, a mixture of an alkyl (C4 -C12) phosphinic acid or salt and a tetraalkylammonium salt wherein the total number of carbon atoms ... | 04/22/1997 |
| 5550295 | Preparation of arylalkyl phosphines, phosphine oxides or phosphine sulfides Arylalkyl phosphines, phosphine oxides or phosphine sulfides are prepared by reacting an alkyl phosphine, phosphine oxide or phosphine sulfide with an arylhalide in the presence of a zero valence palladium catalyst.... | 08/27/1996 |
| 5531330 | Method of depressing non-sulfide silicate gangue minerals A method for the depression of non-sulfide, silicate gangue minerals is provided wherein the depressant is a polymeric material comprising recurring units of the formula: ##STR1## wherein X is the polymerization residue of an acrylamide or mixture of... | 07/02/1996 |
| 5530069 | Methods of making and using high molecular weight acrylamide polymers Dispersions of finely divided high molecular weight polyacrylamide particles are formed and treated with a caustic material to hydrolyze the polymer without undesirable side chain reactions to form high molecular weight anionic acrylamide polymers. A pref... | 06/25/1996 |
| 5525212 | Method of depressing non-sulfide silicate gangue minerals A method for the depression of non-sulfide, silicate gangue minerals is provided wherein the depressant is a mixture of a polysaccharide and a graft polymer of polyvinyl alcohol and an acrylamide.... | 06/11/1996 |
| 5520866 | Process for the preparation of friction materials containing blends of organic fibrous and particulate components Dry processed friction materials are disclosed wherein the components thereof include dry blends of a) fibrillated, organic, synthetic polymer, b) organic, synthetic polymer staple and c) organic, synthetic soluble polymer particles.... | 05/28/1996 |
| 5472995 | Asbestos-free gaskets and the like containing blends of organic fibrous and particulate components Improved asbestos-free fiber reinforced material for use in the manufacture of gaskets, and the like, comprises (a) an elastomeric binder material and (b) a blend of fibrillated, organic, synthetic polymer, organic synthetic polymer staple and organic syn... | 12/05/1995 |
| 5451329 | Dewatering of alumina trihydrate The use of a dewatering aid comprising a sulfosuccinate and an oil in the filtration of alumina trihydrate is disclosed.... | 09/19/1995 |
| 5431783 | Compositions and methods for improving performance during separation of solids from liquid particulate dispersions A method for providing improved liquid-solid separation performance in liquid particulate dispersion systems. The method comprising adding to a liquid system containing a plurality of finely divided particles (i) from about 0.05 to about 10 pounds per ton... | 07/11/1995 |
| 5405554 | High performance dewatering aids Water-soluble, branched, high molecular weight, cationic polymers are used in combination with low molecular weight, cationic polymers to provide the highly improved dewatering of suspended solids. Water-in-oil emulsions containing these cationic polymers... | 04/11/1995 |
| 5391597 | Composition and process for increasing the shear strength of processing wastes used for tip building and underground consolidation There are provided compositions and processes for enhancing the initial and long term shear strength and initial tip stability of process wastes. The process wastes are aqueous dispersions such as the slurry tailings from mining operations. The compositio... | 02/21/1995 |
| 5372632 | Process for producing fiber bonded agglomerated ore materials Process for producing agglomerates, e.g., by pelletizing a particulate inorganic material, for example, an ore material, characterized by the addition to the agglomerated material of an organic fibrous material, especially a polyacrylonitrile fiber materi... | 12/13/1994 |
| 5368781 | Narrow band radiation filter films The present invention discloses a tunable, radiation filter comprising a highly ordered crystalline array of microparticles fixed in a polymerized hydrogel.... | 11/29/1994 |
| 5362562 | Crimped acrylic fibers having improved thixotropic performance Crimped acrylic fibers with a small diameter, a minimum aspect ratio in the 20-50 range, and having a crimp of greater than about 10% so as to enhance the viscosity of polymers, resistance to gravity-induced slumping when applied to vertical surfaces, and... | 11/08/1994 |
| 5360600 | Treatment of mineral and alkali metal carbonate slurries The present invention provides a process for recovering alkali carbonates such as alkali sesquicarbonates from slurries of minerals such as Trona which contain those carbonates as well as clays and shales. The invention further provides a method for recov... | 11/01/1994 |
| 5354801 | Process for producing small polymer phase droplet microemulsions by multistep aqueous phase addition A novel method for producing compositions comprising polymeric solution droplets is disclosed. The products are useful as retention aids in paper pulps, as flocculating agents for flocculating a wide variety of dispersions of suspended solids and as drive... | 10/11/1994 |
| 5354481 | Water-soluble highly branched polymeric microparticles Water-soluble, high molecular weight, polymeric, microparticles with a high degree of branching are disclosed. A microemulsion polymerization process for preparing the microparticles is also disclosed. The microparticles give excellent results in a number... | 10/11/1994 |
| 5344567 | Recovery of indium by solvent extraction using trialkylphosphine oxides This invention relates to a process for the recovery of indium from aqueous acid solutions. More particularly, it concerns the use of a combination of a dialkyl phosphoric acid and a mixture of trialkyl phosphine oxides to extract indium from acidic sulph... | 09/06/1994 |
| 5342552 | Narrow band radiation filter films The present invention discloses radiation filters comprising a highly ordered crystalline array of microparticles fixed in a polymerized hydrogel in which is contained simple sugars or polyhydric alcohols to provide additional low temperature stability.... | 08/30/1994 |
| 5340865 | Cross-linked cationic polyermic microparticles Novel compositions comprising cationic polymeric microparticles are disclosed, along with a method for their production. The products are useful in flocculating a wide variety of dispersions of suspended solids.... | 08/23/1994 |
| 5338492 | Narrow band radiation filter films The present invention discloses radiation filters comprising a highly ordered crystalline array of microparticles fixed in a polymerized hydrogel.... | 08/16/1994 |
| 5338522 | Stabilization of aqueous hydroxylamine solutions Solutions of an hydroxylamine or an at least partially neutralized hydroxylamine salt are stabilized against decomposition by adding thereto a mercaptobenzothiazole, a mercaptothiazoline, a thiuram disulfide, thiourea or a mercaptoalkanol.... | 08/16/1994 |
| 5330685 | Narrow band radiation filter films The present invention discloses satellite peak free radiation filters comprising a highly ordered crystalline array of microparticles fixed in a polymerized hydrogel.... | 07/19/1994 |
| 5320711 | Emulsified mannich acrylamide polymers Compositions comprising microparticles of a cross-linkable, glyoxalated (meth)acrylamide containing, polymeric material are disclosed. They are prepared using inverse microemulsion polymerization techniques and are useful as wet- and dry-strength agents i... | 06/14/1994 |
| 5314923 | Porous polymer beads and process Isotropic porous polymer beads having a high surface porosity and large pore diameters from about 0.002 to about 5 microns are produced from solutions of a polymer or a copolymer by a thermally-induced phase separation process. The use of mixed solvent-no... | 05/24/1994 |
| 5306782 | Surface-modified polyacrylonitrile fibrous substrates A surface-modified fibrillated fiber composition is disclosed herein which comprises polyacrylonitrile homopolymer or copolymer and a surface of pendant N-haloamide groups. Also disclosed is a process for the production of said composition.... | 04/26/1994 |
| 5306632 | Porous acrylonitrile polymer substrate for bonding ligands and separating biologically active substances A porous shaped substrate such as a porous bead is formed from polyacrylonitrile or a copolymer thereof containing nitrile groups. The substrate has a hydrophilic surface containing amide groups constituting about 1.8 mole percent to less than about 15 mo... | 04/26/1994 |
| 5298555 | Low settling water-in-oil emulsions A stable, water-in-oil emulsion comprising an aqueous phase containing a water soluble polymer and an oil phase containing a partially esterified lower N,N-dialkanol fatty amine emulsifier, the ratio of the aqueous phase to the oil phase ranging from abou... | 03/29/1994 |
| 5286806 | Methods of making and using high molecular weight acrylamide polymers Dispersions of finely divided high molecular weight polyacrylamide particles are formed and treated with a caustic material to hydrolyze the polymer without undesirable side chain reactions to form high molecular weight anionic acrylamide polymers. A pref... | 02/15/1994 |
| 5284910 | Surface-modified polyacrylonitrile fibrous substrates A surface-modified fibrillated fiber composition is disclosed herein which comprises polyacrylonitrile homopolymer or copolymer and a surface of pendant N-haloamide groups. Also disclosed is a process for the production of said composition.... | 02/08/1994 |
| 5284911 | Surface-modified polyacrylonitrile substrates A composition is disclosed herein which comprises a core of a polyacrylonitrile homopolymer or copolymer and a surface of N-haloamides. Also disclosed is a process for the production of said composition.... | 02/08/1994 |
| 5270384 | Surface-modified polyacrylonitrile fibrous substrates A surface-modified fibrillated fiber composition is disclosed herein which comprises polyacrylonitrile homopolymer or copolymer and a surface of pendant N-haloamide groups. Also disclosed is a process for the production of said composition.... | 12/14/1993 |
