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| Number | Title | Issue Date |
| 7351295 | Cleaning and polishing rusted iron-containing surfaces A method for cleaning and polishing a rusted iron-containing metal surface is disclosed. The metal surface is contacted with a composition containing fluorometallate anions of a Group IVB metal. ... | 04/01/2008 |
| 7332021 | Coating composition A coating composition comprising an aqueous mixture containing acid-stable particles and one or more fluoroacids. The amount of the acid-stable particles in the coating composition is from 0.005% to 8% by weight on a dry weight basis. The acid-stable particles can b... | 02/19/2008 |
| 7063735 | Coating composition A coating composition comprising an aqueous mixture containing inorganic particles, a catechol compound, and one or more fluoroacids. The preferred fluoroacids are selected from fluorotitanic acid, fluorozirconic acid, fluorosilicic acid, fluoroboric acid, fluorosta... | 06/20/2006 |
| 7029541 | Trivalent chromate conversion coating In a preferred embodiment of the present invention, a conversion coating composition comprising chromium (III) ions, cobalt (II) ions, and nitric acid is provided. The coating composition is substantially free of chromium (VI) ions and substantially free of an oxidi... | 04/18/2006 |
| 6794046 | Chemically passivated object made of magnesium or alloys thereof An article made of magnesium or its alloys, some or all of whose surface has a conversion coating, the conversion coating comprising MgO, Mn2O3 and MnO2 plus at least one oxide from the group consisting of vanadium, molybdenum and tu... | 09/21/2004 |
| 6719852 | PROCESSING SOLUTION FOR FORMING HEXAVALENT CHROMIUM FREE AND CORROSION RESISTANT CONVERSION FILM ON ZINC OR ZINC ALLOY PLATING LAYERS, HEXAVALENT CHROMIUM FREE AND CORROSION RESISTANT CONVERSION FILM AND METHOD FOR FORMING THE SAME A processing solution for forming a hexavalent chromium free, corrosion resistant trivalent chromate conversion film on zinc or zinc alloy plating layers comprises a silicon compound; trivalent chromium and oxalic acid in a molar ratio ranging from 0.5 to 1.5, where... | 04/13/2004 |
| 6464800 | Visible chromium- and phosphorus-free conversion coating for aluminum and its alloys A visible colored chromium- and phosphorus-free conversion coating can be formed on a metal surface by contacting it with an aqueous liquid composition that comprises an alizarine dye and a product of chemical interaction between a first initial reagent c... | 10/15/2002 |
| 5723183 | Metal coloring process The invention is the chemical composition and method for forming a chemical conversion coating on ferrous metal surfaces and subsequent coloring of said conversion coating through the application of a water-soluble dye. The conversion coating has an order... | 03/03/1998 |
| 5505792 | Visible dried-in-place non-chrome polyacrylamide based treatment for aluminum A method of providing color to a polyacrylamide based, dried-in-place, non-chromate conversion coating is provided. The addition of a phthalo green pigment and optionally a nonionic surfactant to an aqueous, dried-in-place conversion coating treatment sol... | 04/09/1996 |
| 5470613 | Composition and method of forming a black no-rinse conversion coating on metal surfaces A black, no-rinse conversion coating on metal surfaces is provided. The treatment of a metal such as aluminum or aluminum alloys with a composition of hexavalent chromium, an acrylic/itaconic modified styrene butyl acrylate polymer resin, a fluoacid, and ... | 11/28/1995 |
| 5292378 | Visible dried-in-place non-chrome treatment for aluminum A method of providing color to a dried-in-place, non-chromate conversion coating is provided. The addition of a phthalo green pigment and optionally a nonionic surfactant to an aqueous, dried-in-place conversion coating treatment solution provides for a c... | 03/08/1994 |
| 5215864 | Method and apparatus for multi-color laser engraving A method and apparatus for engraving a metal plate in two or more colors. Selected areas of an oxidized aluminum plate are colored by a first dye to which the plate has an affinity. The selected areas may then be sealed by hydration. Portions of the selec... | 06/01/1993 |
| 5022938 | Method for preparing corrosion-resistant zinc-cobalt surfaces The present invention relates to compositions and methods for providing a corrosion-resistant coating on a zinc-cobalt alloy surface said surface with a hexavalent chromium-containing treatment solution. In a preferred embodiment, the solution comprises: ... | 06/11/1991 |
| 4814209 | Paint for inhibiting rust staining External rust-staining, for example at the exterior of buildings or on the superstructure or topside of ships, caused by rust dripping onto a surface is inhibited by painting the surface with a top-coat paint comprising a film-forming binder and a substan... | 03/21/1989 |
| 4756771 | Colorless sealing layers for anodized aluminum surfaces A process and composition for producing colorless, cold-sealed, anodized aluminum or aluminum alloy surfaces. The composition comprises an aqueous solution containing nickel ions and a solution of at least one azo or azo metal dye, the colors imparted by ... | 07/12/1988 |
| 4756772 | Method of coloring a porous anodic oxide film on the surface of an aluminum article Aluminum articles having porous anodic oxide films are given an exposure-resistant blue coloration by dipping them first in an aqueous solution of a phosphomolybdic acid or a silicomolybdic acid, and then in a solution of a strong reducing agent such as a... | 07/12/1988 |
| 4702968 | Heat resistant precoated steel sheet and process for the production thereof A heat resistant precoated steel sheet suitable for use in the manufacture of a muffler of an automobile exhaust gas system comprising: a hot dip aluminized steel sheet, a chromate pretreatment layer formed on at least one surface of said hot dip aluminized st... | 10/27/1987 |
| 4631093 | Chromate free method of treating metal substrates to impart corrosion resistance and color to the substrate surface Chromate-free aqueous solutions for treating metal surfaces to impart corrosion resistance and decorative colors are disclosed. The treated metal surface equals or exceeds ASTM adhesion standards for chromate treated metal surfaces. The solutions can be u... | 12/23/1986 |
| 4487636 | Color coding of powder metal parts A process for color coding of a sintered powder metal part is disclosed. The process comprises contacting said metal part with a color formulation comprising: from about 1 to 10 parts of a colorant, from about 1 to 5 parts of nitrocellulose, up to about 4... | 12/11/1984 |
| 4416816 | 1:2 Chromium complex of 1-amino-2-(3',5'-dinitro-2'-hydroxyphenylazo)-4-sulfonaphthalene and alkali metal salts thereof Disclosed are the 1:2 chromium complex of the formula ##STR1## and the alkali metal salts thereof which are useful for the coloration of oxide layers produced on aluminum and alloys thereof and for dyeing natural and synthetic polyamides.... | 11/22/1983 |
| 4411937 | Process and composition for coating metals Method and composition for applying an organic coating to a metallic surface, the surface being contacted with an acidic aqueous coating composition comprising an organic coating-forming material, fluoride, and ferric iron, wherein the thickness and/or we... | 10/25/1983 |
| 4341564 | Corrosion inhibitive pigment Corrosion inhibiting pigments are obtained by partial reduction of a hexavalent chromium compound in aqueous solution obtaining a reaction product containing 5 to 95% of the chromium in lower valent state. In the aqueous reaction mixture there is incorpor... | 07/27/1982 |
| 4331479 | Process of using light-sensitive o-quinone diazide material to make aluminum oxide nameplate A light-sensitive nameplate material comprising an aluminum support having a porous aluminum oxide film on the surface thereof and a light-sensitive organic coating layer comprising an o-quinone diazide provided on the aluminum oxide film.... | 05/25/1982 |
| 4314859 | Process for dyeing zinc and zinc alloys A mulit-colored decorative zinc or zinc alloy having locally organic dyestuff-dyed portions in multi-color is prepared by (1) dyeing with a dyestuff zinc or zinc alloy having a dyeable chromate film bonded thereonto, (2) polishing locally the dyed surface... | 02/09/1982 |
| 4297405 | Corrosion resistant metallic article having a matt nacreous appearance A process for the production of a corrosion resistant metallic article having a matt nacreous appearance and the resultant article. The process comprises the steps of coating a metallic substrate with a clear paint comprising a curable resin vehicle and a... | 10/27/1981 |
| 4277555 | Aluminum lithographic plate with visible image and process Aluminum substrate suitable for making lithographic plates which has been treated to render the surface hydrophilic and negatively charged and thereafter ionically colored with a cationic dye.... | 07/07/1981 |
| 4238250 | Process for dyeing zinc and zinc alloys A multi-colored decorative zinc or zinc alloy having locally organic dyestuff-dyed portions in multi-color is prepared by (1) dyeing with a dyestuff zinc or zinc alloy having a dyeable chromate film bonded thereonto, (2) polishing locally the dyed surface... | 12/09/1980 |
| 4225350 | Non-chromate conversion coatings Improved color, brightness and corrosion resistance are imparted to metal surfaces such as zinc plated surfaces, by treatment with a non-toxic solution comprised of sulfuric acid, hydrogen peroxide, a silicate and at least one cationic triarylmethane dye.... | 09/30/1980 |
| 4212685 | Protective and color receptive coating for aluminum The invention is for a process for providing a protective, color receptive coating over aluminum using chemical means without a requirement for the use of an electric current as in electrical anodizing. Absent conventional steps such as water rinses, the ... | 07/15/1980 |
| 4210499 | Method of forming colored patterns on aluminum or its alloys A colored pattern imitating the grain of wood is formed on the surface of an article formed of an aluminum or its alloys by dipping the article, after oxidation process, in a coating bath floating a coating material in a multilinear or multiannular patter... | 07/01/1980 |
| 4200475 | Process for dyeing aluminum-containing zinc-based alloys A process for dyeing an aluminum-containing zinc-based alloy, which comprises immersing an aluminum-containing zinc-based alloy in an alkaline solution containing hexavalent chromium ion, further immersing the thus treated alloy in an acidic aqueous solut... | 04/29/1980 |
| 4171230 | Transfer medium which is suitable for heat transfer printing on aluminum A transfer medium, made, for example, of paper, is imprinted with sublimable dispersion colorants by halftone printing methods, and is suitable for sublimation heat transfer printing on non-sealed anodized aluminum via the trichromatic principle. The thre... | 10/16/1979 |
| 4161409 | Corrosion inhibitive pigment A chromium chromate complex, obtained by partial reduction of chromic acid in aqueous media with an organic reducing agent, is converted to pigment form by evaporating the resulting aqueous composition to dryness and sub-dividing the obtained solid mass t... | 07/17/1979 |
| 3959032 | Magnetic materials with exchange anisotropy and process for their manufacture Magnetic materials which essentially consist of a phase A with a ferromagnetic spin system and a phase B with an anti-ferromagnetic spin system, phases A and B interacting by exchange coupling, and the manufacture of such materials. The materials consist ... | 05/25/1976 |