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Vladimir Zworykin, television pioneer ; Talking about an invention in which he played a critical role.
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| Number | Title | Issue Date |
| 5827398 | Production of filled paper Filled paper is made by adding a cationising amount of cationic polymer to a slurry of precipitated calcium carbonate, mixing this slurry into a cellulosic suspension and forming a thin stock, adding anionic particulate material to the suspension before o... | 10/27/1998 |
| 5744152 | Polymeric compositions and methods of producing them Release of an active ingredient can be controlled and the active ingredient can be protected from the environment during storage, by distributing it throughout a matrix containing a relatively large amount of polymeric material that is soluble and swellab... | 04/28/1998 |
| 5698109 | Purification of aqueous liquor An aqueous suspension of coagulatable material is coagulated by adding polymeric coagulant to the suspension and then separating the resultant coagulated material from the liquor. The coagulatable material may be present in the aqueous suspension as a sus... | 12/16/1997 |
| 5684106 | Superabsorbent polymers and products containing them Particulate superabsorbent polymeric material which is a partially neutralised polymer of an ethylenically unsaturated carboxylic monomer cross linked by a triethylenic or higher ethylenic cross linking agent, preferably tetra allyl ammonium chloride, abs... | 11/04/1997 |
| 5681480 | Dewatering of aqueous suspensions A mill waste or deinking waste or other suspension containing cellulosic material and hydrophobic material is flocculated by a cationic polymeric flocculant and the flocculated material, is then aggregated by a swelling clay or other anionic colloidal mat... | 10/28/1997 |
| 5660466 | Apparatus and method for uniformly wetting hard-to-wet powders Apparatus for wetting particulate material comprises a duct 1 that is open at its base 2 and that is provided at its top 3 with a duct inlet 4 defined by inlet walls 5 down which water flows continuously from a weir 6 around the top of the walls. Sprays 1... | 08/26/1997 |
| 5574106 | Acrylic polymers and their use in stain resistant polyamide textile products Addition polymers suitable for imparting stain resistance to nylon carpets and other polyamide products are formed of styrene or other ethylenically unsaturated monomer containing cyclic hydrocarbon groups, sodium vinyl sulphonate or other ethylenically u... | 11/12/1996 |
| 5534035 | Leather treatment compositions A copolymer for use in rendering leather water repellant is formed from ethylenically unsaturated monomer and ethylenically unsaturated monofunctional monomer, wherein the monomers include mono- or di- fatty alkyl ester of dicarboxylic acid and a free car... | 07/09/1996 |
| 5529975 | Sprayable agricultural compositions The systemic activity of systemic active ingredients in sprayed foliar systemic compositions is improved by incorporating water soluble polyacrylamide in the sprayed composition. The polyacrylamide can have a molecular weight sufficiently low that its pre... | 06/25/1996 |
| 5492646 | Polymeric matrix particle compositions containing coacervate polymer shell This invention relates to the encapsulation of active ingredient within polymeric material so as to protect the active ingredient from the ambient environment, for instance atmospheric moisture when the product is exposed to the air, or the liquid phase o... | 02/20/1996 |
| 5384343 | Water absorbing polymers A water absorbing particulate polymer material wherein the polymer material when in dry powder form has a particle size of about 50 μm to about 500 μm and wherein the particles consist of internally bonded finer particles which finer particles have a si... | 01/24/1995 |
| 5324445 | Polymeric compositions A liquid composition is disclosed which comprises a substantially stable dispersion in a liquid phase of particles comprising a detergent enzyme and a protective polymeric material that is impermeable to liquid detergent concentrates but releases the enzy... | 06/28/1994 |
| 5310774 | Molecular weight degradation stabilized polymeric compositions Polymeric compositions are stabilized against molecular weight degradation by the inclusion in the composition of an inhibitor which is preferably an ethylenically unsaturated compound. The invention is of particular value when the polymer is a polymer of... | 05/10/1994 |
| 5302186 | Pelletisation process Pellets of iron ore or other water insoluble particulate material are made from a mixture of the particulate material, moisture and a pelletizing binder by forming moist green pellets, a water displacing additive is applied to the surface of these pellets... | 04/12/1994 |
| 5283272 | Process and apparatus for performing chemical reactions High molecular weight polymer that can form a viscous aqueous solution is chemically modified by mixing the previously formed polymer (as a powder, reverse phase dispersion or oil-in-water emulsion) with water and the reagent for effecting the chemical mo... | 02/01/1994 |
| 5280079 | Absorbent products and their manufacture A water absorbent water insoluble polymeric element, such as a fibre, film, coating, bonding layer or foam, is made by forming a substantially linear polymer by polymerisation of water soluble ethylenically unsaturated monomer blends comprising carboxylic... | 01/18/1994 |
| 5254221 | Processes for the production of paper and paper board The use of very high molecular weight polymers which are substantially completely water soluble as flocculants in paper making improves drainage time without adversely affecting formation, even when used in high shear processes.... | 10/19/1993 |
| 5223098 | Clay compositions and their use in paper making Bentonite swelling clay is provided to a paper making mill as a fluid concentrate containing more than 15% bentonite wherein swelling of the bentonite is prevented by inorganic electrolyte in the concentrate, and the bentonite swells upon dilution either ... | 06/29/1993 |
| 5214096 | Water soluble acrylic polymerizable materials, polymers made from them, and processes of making them Water soluble polymerizable acrylic prepolymers can be formed from ethylenically unsaturated monomers that include monomers that provide a pendant group that is a blocked, saturated, ethylenic group, followed by unblocking the pendant saturated ethylenic ... | 05/25/1993 |
| 5210324 | Monomer production A new process for producing allyl ethers, usually C8-30 alkyl (CH2 CH2 O)5-100 allyl ether, by forming a solution of an alcohol, usually a surfactant alcohol, in a solvent capable of forming an azeotrope with wa... | 05/11/1993 |
| 5194263 | Particulate materials, their production and use Agrochemical and other particulate compositions are formed by coacervation. The coacervate is preferably formed from two water soluble coacervating polymers and stabilizes the particles against agglomeration. The coacervate is preferably formed from a rel... | 03/16/1993 |
| 5185061 | Processes for the production of paper and paper board The use of very high molecular weight polymers which are substantially completely water soluble as flocculants in paper making improves drainage time without adversely affecting formation, even when used in high shear processes.... | 02/09/1993 |
| 5178774 | Purification of aqueous liquor An aqueous suspension of coagulatable material is coagulated by adding polymeric coagulant to the suspension and then separating the resultant coagulated material from the liquor. The coagulatable material may be present in the aqueous suspension as a sus... | 01/12/1993 |
| 5171781 | Polymeric compositions Water absorbent particulate polymers and their uses are described. Friable aggregates may be made by bonding substantially dry polymer particles with an aqueous liquid and drying the aggregates. These aggregates can be broken down to the individual polyme... | 12/15/1992 |
| 5147956 | Absorbent products and their manufacture A water soluble, substantially linear, polymer is made by copolymerization of a water soluble blend of monoethylenically unsaturated monomers comprising carboxylic acid monomers such as acrylic acid and a hydroxylic monomer of the formula CHR1 ... | 09/15/1992 |
| 5112500 | Purification of aqueous liquor Suspended solids are separated from an aqueous suspension by mixing into the suspension first and second flocculants that would normally be incompatible in solution but which are added in the form of solids which dissolve into the suspension, and the resu... | 05/12/1992 |
| 5102455 | Agglomeration of particulate material employing a polymer Particulate material such as iron ore is agglomerated into pellets or other agglomerates by being homogeneously mixed in the presence of moisture with a binder followed by agglomeration of the moist mixture, and the binder comprises a water soluble anioni... | 04/07/1992 |
| 5100660 | Thickened acidic aqueous compositions using cross-linked dialkylaminoacrylic microparticles This invention relates to aqueous acidic solutions which are thickened by cationic polymer, the polymer being added to the solution in the form of particles below 10 μm in size. The useful cationic polymers are formed from a water soluble cationic ethyle... | 03/31/1992 |
| 5100467 | Agglomeration of particulate material mixed prior to addition of polymer Iron ore particles or other water insoluble non-swellable particulate material is converted into pellets or other agglomerates by mixing with substantially dry binder in the presence of moisture and is then bonded into agglomerates. The binder comprises s... | 03/31/1992 |
| 5099049 | Chelate compositions and their production A compound that is the water insoluble hydrochloride addition salt of the dihydrogen ferric complex of diethylene triamine penta-acetic acid, DTPAH5, namely DTPAFeH3 Cl, which has been made in pure form from DTPANa5, and w... | 03/24/1992 |
| 5075401 | Method of making graft copolymers A graft copolymer is made by grafting, by a free radical reaction mechanism in aqueous solution, water soluble ethylenically unsaturated monomeric material on to a water soluble substrate having hydroxyl groups, and the free radicals are formed on the sub... | 12/24/1991 |
| 5035900 | Methods of drying biological products Enzymes and other biologically produced materials are recovered from the fermentation broth or other liquor in which they are provided initially and simultaneously distributed throughout particles of a polymeric matrix by dissolving the polymer in the liq... | 07/30/1991 |
| 5002607 | Process for pelletizing particulate materials Particulate metal ore is pellitized by use of a novel polymeric binder that comprises aggregates of polymer particles and that have a size mainly above 100 μm and the aggregates are disintegrated during the process.... | 03/26/1991 |
| 4997714 | Absorbent products and their manufacture Film or fibre is made from a polymer of water soluble ethylenically unsaturated monomeric material that includes ionic monomer by extrusion and stretching, and a counterionic lubricant compound is absorbed into the surface of the fibre or film before or d... | 03/05/1991 |
| 4996251 | Polymeric compositions and their production The invention provides a substantially dry particulate composition comprising a polyacrylamide and an amidase. An aqueous composition made by dispersing this into water will then have a satisfactorily low content of residual acrylamide even if the initial... | 02/26/1991 |
| 4981398 | Dust suppressant for minerals Oil dispersions of water-soluble anionic polymer particles and water-soluble cationic polymer particles are mixed with water to form an aqueous solution containing one polymer in an amount in the range 10 to 40 mole % (moles of anionic groups) and the oth... | 01/01/1991 |
| 4980434 | Absorbent polymers, their manufacture and uses The properties of absorptive synthetic polymer particles formed by polymerisation of water soluble monomers such as sodium acrylate or acrylamide with a cross linking agent are improved, especially as regards absorptive capacity for aqueous electrolytes, ... | 12/25/1990 |
| 4969976 | Pulp dewatering process Dry market pulp is made by shearing a cellulosic suspension and draining it through a screen to form a pulp sheet which is then dried, and the productivity of the process is increased by adding a water soluble cationic polymer before the shearing and bent... | 11/13/1990 |
| 4962172 | Absorbent products and their manufacture A water absorbent water insoluble polymeric element, such as fibre, film, coating, bonding layer or foam, is made by forming a substantially linear polymer by polymerization of water soluble ethylenically unsaturated monomer blends comprising carboxylic a... | 10/09/1990 |
| 4959502 | Catalysts and their use in the hydrolysis of nitriles When making an amide by hydrolysis of a nitrile in an aqueous medium containing a Raney copper or other black copper catalyst, the hydrolysis reaction can be improved if the catalyst has been contacted with an aqueous solution of a water soluble vanadium ... | 09/25/1990 |
