Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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 |
| 7163564 | Method for brightening virgin mechanical pulp A method for brightening virgin mechanical pulp. The method comprises combining: (i) an aqueous solution comprising sodium borohydride and sodium hydroxide; and (ii) an aqueous solution comprising sodium bisulfite, in a chemical mixer and adding output of the chemic... | 01/16/2007 |
| 6911069 | Stain resistant coating composition Iodine or iodophor stain resistance is imparted to a surface by applying a hardenable coating composition containing an effective amount of a reducing agent having a redox potential sufficient to decolorize an iodine or iodophor stain. The reducing agent reacts with... | 06/28/2005 |
| 6710151 | Terminal-blocked isocyanate prepolymer having oxadiazine ring, process for producing the same, and composition for surface-coating material The end-blocked isocyanate prepolymer having an oxadiazine ring according to the present invention is characterized in that at least one of isocyanate groups of a NCO-terminated isocyanate prepolymer, which has NCO groups at the ends and comprises units derived from... | 03/23/2004 |
| 6402984 | Composition for preventing corrosion using a sulfite-based oxygen scavenger The invention effectively prevents occurrence of corrosion in water tubes or the like of boilers. The invention provides a method for operating a boiler, including regulating a concentration of sulfate ions SO42- in boiler water to u... | 06/11/2002 |
| 6007885 | Oxygen scavenging compositions and methods for making same An oxygen scavenging composition capable of providing good oxygen absorption capabilities wherein the oxygen scavenging agent is a hydroxosulfitometalate. Methods for making a hydroxosulfitometalate are also disclosed.... | 12/28/1999 |
| 5547475 | Phosphate-free reduction bleaching formulation A phosphate-free reduction bleach formulation comprising (a) a reduction bleaching agent and (b) a bleach stabiliser selected from (b1) a citric acid derivative, (b2) a homo- or copolymer of an ethylenically unsaturated mono- or dicarboxylic a... | 08/20/1996 |
| 5545599 | Process for whitening kaolin The present invention provides a process for whitening kaolin contaminated with chlorite/biotite micas. The process comprises the steps of contacting the kaolin contaminated with chlorite/biotite micas with an aqueous acid solution to convert the chlorite... | 08/13/1996 |
| 5397754 | Method of brightening kaolin clay by thermal oxidative decarboxylation of organic contaminants A method for brightening kaolin contaminated with organic matter by decarboxylation treatment of an aqueous kaolin slurry. The decarboxylation is carried out by contacting the clay slurry with selected oxidizing agent in a pressurized reaction vessel at a... | 03/14/1995 |
| 5391526 | Situ method for producing hydrosulfite bleach and use thereof A process for reacting metallic iron with sulfur dioxide (SO2) gas in the presence of water and bleachable matter, especially iron-contaminated kaolin clay, whereby the kaolin or the like is bleached in situ and the viscosity of the kaolin is l... | 02/21/1995 |
| 5366510 | Process for desizing and color fading garments A process for desizing an/or color fading of fabrics and garments utilizing a reducing agent. The process is particularly for pretreating fabrics which are subsequently decolorized with oxidizing agents.... | 11/22/1994 |
| 5182046 | Sodium borohydride composition and improved method of producing compacted sodium borohydride Improved sodium borohydride powder compositions have a silica-based anticaking agent. In a method wherein a mixture of sodium borohydride and an anti-caking agent are compacted under pressure, the process is improved, particularly in speed, by the use of ... | 01/26/1993 |
| 5169555 | Pulp bleaching solution A sodium borohydride/sodium hydroxide solution for dithionite generation contains sufficient levels of diethylene triamine pentaacetic acid to chelate metals in the dithionate generation process and also in a pulp bleaching process.... | 12/08/1992 |
| 5078894 | Formulations for iron oxides dissolution A mixture of a di- or polyphosphonic acid and a reductant wherein each is present in a sufficient amount to provide a synergistic effect with respect to the dissolution of metal oxides and optionally containing corrosion inhibitors and pH adjusting agents... | 01/07/1992 |
| 5017301 | Method for permanganate bleaching of fabric and garments Permanganate based fabric bleaching processes, such as stone-washing processes, are substantially improved by utilizing a reducing composition comprising a metabisulfite and a sulfite in the washing step. The relative amounts of metabisulfite and sulfite ... | 05/21/1991 |
| 5006327 | Alkali metal hydrosulfite solutions An aqueous solution comprising alkali metal hydrosulfite and hydroxide ions in an amount to provide a residual alkalinity of at least 0.25 moles per liter results in the decomposition of thiosulfate ions present and inhibits their formation during storage... | 04/09/1991 |
| 4973471 | Method for producing dust-free sodium dithionite There is disclosed a method for the production of dust-free sodium dithionite from the reaction of a alkaline formate sulfur dioxide and an alkaline metal agent in the presence of a thiosulfate reactive compound by introducing a water-soluble polymer havi... | 11/27/1990 |
| 4919755 | Process for bleaching Process for bleaching of materials, at which an aqueous solution of borohydride containing borohydride corresponding to from 15 to 35 percent by weight of sodium borohydride and hydroxylic ions corresponding to not more than 10 percent by weight of NaOH i... | 04/24/1990 |
| 4797225 | Nonaqueous liquid nonionic laundry detergent composition containing an alkali metal dithionite or sulfite reduction bleaching agent and method of use A liquid laundry detergent composition containing an alkali metal dithionite or sulfite reduction bleaching agent. The preferred compositions are nonaqueous liquids based on liquid nonionic surfactants and include a detergent builder salt suspended in the... | 01/10/1989 |
| 4795476 | Method for permanganate bleaching of fabric and garments Permanganate based fabric bleaching processes, such as stone-washing processes, are substantially improved by utilizing a reducing composition comprising a metabisulfite and a sulfite in the washing step. The relative amounts of metabisulfite and sulfite ... | 01/03/1989 |
| 4729886 | Method of preparing reproducibly stable aqueous suspensions of sodium dithionite for woodpulp bleaching Aqueous sodium dithionite slurries or suspensions, which are nonsettling during shipment thereof and are thereafter pumpable after storage at 32°-40° F. for at least fourteen days, comprise, on a weight basis, about 34% of sodium dithionite, about 0.17%... | 03/08/1988 |
| 4680136 | Method for preparing compositions which can be used in the production of sodium dithionite; and the use of such compositions There is provided a method for producing compositions which can be used for preparing sodium dithionite, in which sulphur dioxide is brought into contact with a recirculating aqueous solution of sodium hydroxide and previously absorbed sulphur dioxide to ... | 07/14/1987 |
| 4676961 | Stabilized water-containing sodium dithionite formulations which have been rendered alkaline Stabilized water-containing sodium dithionite formulations which have been rendered alkaline have the consistency of a pumpable paste. They additionally contain readily soluble sodium salts and/or potassium salts which are inert to sodium dithionite and w... | 06/30/1987 |
| 4614647 | Stabilized sodium dithionite formulations containing inert organic liquids, and the use of these formulations Sodium dithionite formulations containing inert organic liquids have the consistency of a pumpable paste.... | 09/30/1986 |
| 4283303 | Process for manufacture of stable sodium dithionite slurries Substantially stable slurries containing 30-35% by weight of sodium dithionite are manufactured by evaporating sodium dithionite solutions while maintaining the heating medium at 220°-250° F. and the solution and slurry at 110°-155° F. under a vacuum ... | 08/11/1981 |
| 4157980 | Hydrosulfite preparation Aluminum metal is activated with hydrochloric acid and then reacted with an aqueous solution of sulfur dioxide to produce an aluminum hydrosulfite (dithionite) liquor useful for bleaching materials such as clay. The aluminum hydrosulfite can be converted ... | 06/12/1979 |
| 4104192 | Oxygen absorbent An oxygen absorbent comprising a dithionite and at least one compound having water of crystallization or water of hydration is disclosed.... | 08/01/1978 |
| 4102803 | Oxygen-consuming composition An effective oxygen-consuming composition for packages, containers, or other closed spaces, especially containing an article susceptible to oxidative deterioration, comprises a dithionite for reacting with oxygen, sufficient alkaline material to at least ... | 07/25/1978 |
| 4100098 | Stabilized solutions of sodium dithionite Aqueous solutions containing mixtures of sodium dithionite and sodium sulfite having concentrations of greater than 13 percent by weight of Na2 S2 O4 are stabilized by adding potassium hydroxide in an amount which is suffi... | 07/11/1978 |
| 4092154 | Aluminum containing precipitating agent for precious metals and method for its use A precipitating agent for precipitating precious metals such as gold from aqueous cyanide solution of the precious metal ions includes aluminum powder and a reducing agent such as sodium hydrosulfite, sodium borohydride or hydrazine. The precipitating age... | 05/30/1978 |
| 4076795 | Hydrosulfite production An improved method for producing iron hydrosulfite liquor by reduction of sulfur dioxide with metallic iron is disclosed. Also disclosed are improvements in the conversion of the iron hydrosulfite liquor to produce sodium hydrosulfite bleach liquors.... | 02/28/1978 |
| 3985674 | Stabilized sodium dithionite solutions Sodium dithionite bleaching solutions for groundwood pulps which require no additional chemicals for pH adjustment prior to direct application to the pulps, based on zinc-derived or formate-derived sodium dithionite and containing small percentages of at ... | 10/12/1976 |
| 3960649 | Wood pulp bleaching composition containing sodium hydrosulfite and hexamethylenetetramine An aqueous composition for bleaching wood pulp containing sodium hydrosulfite, and at least 2 weight percent hexamethylenetetramine based upon the weight of sodium hydrosulfite, wherein the solution has a pH between about 4 and about 11. The hexamethylene... | 06/01/1976 |
