Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7278487 | Methods of using chemical wash compositions for removing drilling fluids Methods of removing a fluid from a well bore with a chemical wash composition, and more particularly, methods of using chemical wash compositions comprising water, a sulfonated lignin, and a taurate are provided. In one embodiment, a method of at least partially rem... | 10/09/2007 |
| 6593460 | Method for grafting lignin, polymerizates produced according to the method and the utilization thereof The invention relates to biologically degradable lignin graft polymers comprised of lignin and ethylenically unsaturated monomers which are formed by an enzymatically catalyzed polymerization method in the presence of organic peroxides. The polymerizates ... | 07/15/2003 |
| 6239198 | Method for preparing alkaline solutions containing aromatic polymers The invention proposes a process which enables separation of aromatic polymers which can be precipitated by acidification, as can be found especially in waste water from cellulose production, from an alkaline solution in a reliable manner and in pure form... | 05/29/2001 |
| 6214976 | Chemical method for lignin depolymerization A process for depolymerizing and/or chemically modifying lignin or lignin-like compounds in which a solution of copper and peroxide acts on lignin and/or lignin-like substance at a temperature of less than 100° C., characterized in that the solution is a... | 04/10/2001 |
| 6207808 | Catalytic method for the preparation of lignin phenol surfactants in organic solvents A method of making surfactants from lignin is disclosed by reducing lignin in the presence of a metal oxide or iron based catalyst in an organic hydrogen donor solvent to produce lignin phenol and subjecting the lignin phenol to one or a combination of se... | 03/27/2001 |
| 6100385 | Catalytic method for the preparation of lignin phenol surfactants in organic solvents A method of making surfactants from lignin is disclosed by reducing lignin in the presence of a metal oxide or iron based catalyst in an organic hydrogen donor solvent to produce lignin phenol and subjecting the lignin phenol to one or a combination of se... | 08/08/2000 |
| 5840834 | Technique for joining amino acid sequences and novel composition useful in immunoassays Two amino acid sequences are joined together using an electron acceptor moiety and a linking moiety, such as a chelating agent. In particular, an amino acid sequence specific for binding to a material interest is linked to an enzyme which acts on an indic... | 11/24/1998 |
| 5824189 | Oxidative delignification of wood pulp or fibers using transition metal-substituted polyoxometalates A method for delignifying wood pulp and fiber is disclosed. The method comprises the steps of obtaining a wood pulp and exposing the wood pulp to a polyoxometalate of the formula V1 Mom Wn Nbo Tap (... | 10/20/1998 |
| 5811527 | Lignin composition, method of producing the same and dispersing agent for cement used the same A lignin composition having a content of aluminum or iron or both at 0.05 to 5 wt. % (based on the solids of the lignin solution) and a content of extracts with chlorotrifluoroethylene dimer at 0.01 to 0.4 wt. % (based on solids in lignin solution). The l... | 09/22/1998 |
| 5695605 | Oxidative delignification of wood or wood pulp by transition metal-substituted polyoxometalates A method for delignifying wood pulp and fiber is disclosed. The method comprises the steps of obtaining a wood pulp and exposing the wood pulp to a polyoxometalate of the formula Vl Mom Wn Nbo Tap (... | 12/09/1997 |
| 5695606 | Oxidative delignification of wood or wood pulp by transition metal-substituted polyoxometalates A method for delignifying wood pulp and fiber is disclosed. The method comprises the steps of obtaining a wood pulp and exposing the wood pulp to a polyoxometalate of the formula Vl Mom Wn Nbo Tap (... | 12/09/1997 |
| 5674677 | Immunoassay technique using histidine tags, metals, and chelating agents Two amino acid sequences are joined together using an electron acceptor moiety and a linking moiety, such as a chelating agent. In particular, an amino acid sequence specific for binding to a material interest is linked to an enzyme which acts on an indic... | 10/07/1997 |
| 5610124 | Tin/cerium compounds for lignosulfonate processing This invention concerns tin-, cerium-, and base-treated tin-bearing lignosulfonates, a process for their preparation from calcium lignosulfonate, and a process for the use thereof as drilling fluid additives.... | 03/11/1997 |
| 5554596 | Virus inhibiting composition A composite molecular active substance group for use in restitutive chemotherapy against viral infections, which is produced by the process comprising: (a) preparing lignin units by carrying out an extraction in an aqueous media under weakly acidic or alk... | 09/10/1996 |
| 5552019 | Oxidative delignification of wood or wood pulp by transition metal-substituted polyoxometalates A method for delignifying wood pulp and fiber is disclosed. The method comprises the steps of obtaining a wood pulp and exposing the wood pulp to a polyoxometalate of the formula [Vl Mom Wn Nbo Tap (T... | 09/03/1996 |
| 5549789 | Oxidation of lignin and polysaccharides mediated by polyoxometalate treatment of wood pulp A method for oxidative degradation of lignin and polysaccharide fragments dissolved during polyoxometalate delignification or bleaching of wood pulp, wood fiber or pulp obtained from a non-woody plant. The method comprises the steps of obtaining a spent p... | 08/27/1996 |
| 5446133 | Nitric acid oxidized lignosulfonates A process for producing an oxidized lignosulfonate composition comprising admixing a lignosulfonate and nitric acid such that the amount of acid comprises from about 35% to about 100% by weight of dry solids of the lignosulfonate, and reacting said mixtur... | 08/29/1995 |
| 5401718 | Tin/cerium compounds for lignosulfonate processing This invention concerns tin-, cerium-, and base-treated tin-bearing lignosulfonates, a process for their preparation from calcium lignosulfonate, and a process for the use thereof as drilling fluid additives.... | 03/28/1995 |
| 5302248 | Delignification of wood pulp by vanadium-substituted polyoxometalates A method for delignifying wood pulp is disclosed. The method comprises the steps of obtaining a wood pulp and exposing the wood pulp to a polyoxometalate of the formula [Vn Mom Wl Nbo Tap (TM)q | 04/12/1994 |
| 5286412 | Modified lignosulfonate dispersant for gypsum The present invention relates to a non-set retarding lignosulfonate dispersing agent useful for making an aqueous calcined gypsum slurry, said dispersing agent produced by contacting an aqueous solution of a lignosulfonate with a salt of a multivalent met... | 02/15/1994 |
| 5229498 | Method of cleansing a protein from multivalent metal ions bound thereto A method is provided for cleansing a protein from multivalent metal ions bound thereto, these ions being released from the protein by exchanging the ions with monovalent metal ions, whereafter the multivalent metal ions are removed. The release and remova... | 07/20/1993 |
| 5130419 | Process for preparing lignocellulosic bodies Process for preparing lignocellulosic bodies by bringing lignocellulosic parts into contact with a composition comprising a polyisocyanate, fumed silica and a non-ionic liquid gellant and by pressing this combinations of parts and composition. The adhesio... | 07/14/1992 |
| 5124312 | Drilling fluid thinners The present invention relates to drilling fluid additives, more particularly to superior drilling fluid thinners or polyfunctional drilling fluid conditioners, and methods of their preparation. The thinners comprise chelates and complexes prepared by reac... | 06/23/1992 |
| 4925923 | Lignin having chemically bound sulfur and phosphorus groups mainly as thiophosphate, using phosphorus pentasulfide A product comprising, a water insoluble lignin material, at neutral or acid pH, having chemically bound a sulfur(S) content from at least 9.5%, and a phosphorus(P) content from 3.3 to 10%. At least 50% by weight of the S and P content is thiophosphate. In... | 05/15/1990 |
| 4853465 | Organophilic polyphenolic acid adducts Organophilic polyphenolic materials which are effective fluid loss control additives for oil base well-working fluids are prepared from a polyphenolic material and one or more phosphatides. Preferred phosphatides are phosphoglycerides obtained from vegeta... | 08/01/1989 |
| 4773966 | Oxidative degradation of lignin with inorganic metal complexes A method is disclosed to degrade lignin comprising reacting the lignin in a liquid medium under aerobic conditions with an amount of persulfate anion and a transition metal cation effective to catalyze the oxidative degradation of the lignin.... | 09/27/1988 |
| 4755307 | Process for making drilling fluid additives containing lignosulfonates An improved process for making drilling fluid additives. The drilling fluid additives generally comprise titanium and/or zirconium lignosulfonates. The improved process of this invention can be performed without any delays caused by plugging during filtra... | 07/05/1988 |
| 4737295 | Organophilic polyphenolic acid adducts Organophilic polyphenolic materials which are effective fluid loss control additives for oil base well-working fluids are prepared from a polyphenolic material and one or more phosphatides. Preferred phosphatides are phosphoglycerides obtained from vegeta... | 04/12/1988 |
| 4594169 | Drilling fluid additives Drilling fluid additives are prepared by complexing humic acids and/or lignins, with three compounds of zirconium, nickel and iron. The metal composition of the additives is 1.3 to 2.5% of zirconium, 0.8 to 1.5% of nickel and 0.8 to 1.5% of iron, and is t... | 06/10/1986 |
| 4487766 | Growth stimulants and compositions containing same Biochemically active materials having anabolic bioactivity for favorably influencing the intracellular and systemic metabolism of higher organisms are disclosed. The materials consist of water-soluble acid carbonization products of lignoid natural materia... | 12/11/1984 |
| 4457853 | Oil well drilling clay conditioners and method of their preparation Improved drilling fluid additives or conditioners are obtained by oxidation of sulfonated lignin-containing materials with manganese dioxide and boron addition either before or after the oxidation step. The resulting manganese-boron lignosulfonates are mo... | 07/03/1984 |
| 4421655 | Organophilic polyphenolic acid additives for well-working compositions The invention provides novel organophilic derivatives of polyphenolic compounds which are readily soluble and/or dispersible in hydrocarbons to prepare oil base well-working compositions having a low filter loss. These fluid loss additives are obtained by... | 12/20/1983 |
| 4355996 | Azo dye reduction improvement of lignin Improved sulfonated lignin surfactants are provided for use as dispersants in dyestuffs. The process for providing the improved surfactants relates to using metals and borate salts to react with the azo dye reducing dihydroxy functions of the lignin molec... | 10/26/1982 |
| 4329437 | Process for the production of broken down lignin-cellulose silicate copolymers Small particles of cellulose-containing plants and an oxidated silicon compound are mixed with an alkali metal hydroxide then heated to 150° to 220° C. while agitating thereby producing an alkali metal broken down lignin-cellulose silicate polymer which... | 05/11/1982 |
| 4220585 | Drilling fluid additives A drilling fluid additive effective as a viscosity controlling agent is composed of complex titanium or zirconium lignosulfonates and/or salts of lignosulfonic acid. Alternatively, the additive may be a titanium-iron lignosulfonate and/or salt or lignosul... | 09/02/1980 |
| 4168252 | Process for manufacturing organosilicon synthetic resin from alkali pulp black liquor A method for producing organosilicon oils and resins from alkali pulp black liquors wherein the black liquor is first mixed with a substance having an acidity stronger than silicic acid and then the mixture is heated and concentrated precipitate convert a... | 09/18/1979 |
| 4100155 | Method of condensing and/or polymerizing sulfonated lignin containing materials A method for polymerizing sulfonated lignin containing materials by adjusting the pH of the materials to a pH below 7, adjusting the moisture content of the materials to a value sufficient to allow the conversion to proceed, but less than 15 percent, and ... | 07/11/1978 |
| 4051115 | Process for the production of lignin silicate and lignin silicoformate A dry granular mixture of silicoformic acid and metasilicic acid, lignin and an alkali catalyst are mixed together, heated and chemically reacted to produce lignin silicate and lignin silicoformate.... | 09/27/1977 |
| 3985667 | Process and composition for drilling shale formation in sea water A process and composition for drilling a well through shale formation in sea water with an aqueous drilling mud comprising a clay -- sea water slurry containing a potassium salt of lignosulfonate. The lignosulfonate is prepared by reaction of potassium hy... | 10/12/1976 |
