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| Number | Title | Issue Date |
| 7828911 | Colored conversion layers devoid of chrome formed on metal surfaces A method for producing coloured layers on zinc, aluminium, magnesium or alloy surfaces. The surfaces are brought into contact with an aqueous treatment solution which is devoid of chrome, said solution containing, in total, 3-35 g/l persulfate ions and/or peroxodisu... | 11/09/2010 |
| 7763121 | Rubber part having an aluminum-based metal component and method of producing the same A rubber part having an aluminum-based metal component including the metal component, a chemical film A formed on an outer peripheral surface of the metal component which is transformable following a squeezing of the metal component, an adhesive layer B formed on an... | 07/27/2010 |
| 7078809 | Chemical leadframe roughening process and resulting leadframe and integrated circuit package A chemical leadframe roughening process includes cleaning and chemically micro-etching a raw copper leadframe to remove organic material and oxide material from the surface. The surface of the leadframe is then roughened using an organic and peroxide solution, resul... | 07/18/2006 |
| 6969638 | Low cost substrate for an integrated circuit device with bondpads free of plated gold Disclosed herein is a process for assembling an integrated circuit, as well as the assembly resulting from the process, employing a surface treatment of bondpad surfaces. In one aspect, a method of assembling an integrated circuit includes providing a substrate havi... | 11/29/2005 |
| 6723385 | Process for the preliminary treatment of copper surfaces A process to pretreat copper surfaces for tight bonding to organic substrates as those found in multilayer printed circuit boards includes first treating the copper with a solution containing hydrogen peroxide, and at least one acid, and at least one nitrogen-contai... | 04/20/2004 |
| 6669786 | Self-healing non-chromate coatings for aluminum and aluminum alloys Disclosed are processes and compositions of solutions for chromate-replacement coatings for aluminum and aluminum alloys. A preferred method includes forming a boehmite coating layer that includes Al (III) ions on an aluminum surface, and applying an ioni... | 12/30/2003 |
| 6562149 | Solution and process to pretreat copper surfaces The invention concerns processes and solutions for the preliminary treatment of copper surfaces which are subsequently to be firmly bonded to organic substrates. The solution is used, in particular, for firmly bonding laminated multilayered printed circui... | 05/13/2003 |
| 6528182 | Zinc coated steel plates coated with a pre-lubricating hydroxysulphate layer and methods for obtaining same The invention concerns a steel plate coated with a metal layer based on zinc and a zinc hydroxysulphate layer, whereof the surface density of sulphur is more than 0.5 mg/m2. The invention also concerns a method for obtaining said plate by treat... | 03/04/2003 |
| 6451130 | Method for forming Cr2O3 film on stainless steel surface A method for forming a chromium oxide film on the surface of a stainless steel sample. The method includes: (a) placing a sample having stainless a steel surface into a vacuum furnace, evacuating the vacuum furnace to a pressure of 2×10-7 to 3... | 09/17/2002 |
| 6309477 | Non-chromium pretreatment chemicals The present invention is relates to pretreatment chemicals metal materials to be painted containing at least one kind of sulfur-containing compounds and at least one of phosphorus ion-containing compounds, and an anticorrosive treatment of metal materials... | 10/30/2001 |
| 6258463 | Anodized cryogenically treated aluminum The invention relates to a process for producing anodic coatings with superior corrosion resistance and other properties on aluminum and aluminum alloy surfaces by cryogenically treating the aluminum prior to anodizing. The invention also relates to the a... | 07/10/2001 |
| 6241830 | Non-chromium anticorrosive treatment The present invention relates to an anticorrosive treatment including following steps (1) contacting a metal to be treated with an aqueous solution containing one or more kinds of compounds containing phosphorus ions, (2) washing it if desired, and (3) ap... | 06/05/2001 |
| 6206981 | Process for enhancing the adhesion of organic coatings to metal surfaces A process is described for increasing the adhesion of organic coatings to metal surfaces, particularly aluminum and aluminum alloys. The process involves the utilization of an adhesion promoting composition in conjunction with a chromating composition in ... | 03/27/2001 |
| 5869195 | Corrosion resistant carbon steel Corrosion of conventional refinery steels due to sulfur bearing, carboxylic acid containing hydrocarbon materials is minimized by forming on the surface of the steel a fine grain iron sulfide film where at least the steel surface is substantially all of a... | 02/09/1999 |
| 5728236 | Process for producing an ornamental rust finish on a ferrous metal surface A chemically derived product that rusts metal instantly upon contacting the surface of a metal and which can be easily and safely used by ornamental metal craftpersons. The chemically derived product is a liquid compound that contains the following consti... | 03/17/1998 |
| 5468307 | Non-chromated oxide coating for aluminum substrates (A.) A process for forming a cobalt conversion coating on a metal substrate, thereby imparting corrosion resistance and paint adhesion properties. The invention was developed as a replacement for the prior art chromic acid process. The process includes th... | 11/21/1995 |
| 5456767 | Corrosion inhibition with bilayer-forming surfactants A method for inhibiting corrosion of a metal surface in a liquid medium is described. The method comprises incorporating into the medium a corrosion inhibiting amount of a combination of a surfactant that forms a bilayer on the metal surface in the fluid ... | 10/10/1995 |
| 5417775 | Process for continuous titanium sheet pickling and passivation without using nitric acid Process for sheet titanium pickling followed by passivation. Pickling is carried out in an aqueous solution containing H2 SO4, HF and Fe3+ at ࣘ50° C., continuously fed with an air flow, and with a stabilized H2 | 05/23/1995 |
| 5376190 | Method for producing a green protective coating on copper A method for forming a protective layer on a copper surface is set forth. The surface of degreased strips or sheets of copper are roughened by mechanical treatment in a controlled manner. The roughened surfaces of the strips or sheets are then chemically ... | 12/27/1994 |
| 5366934 | Method for sulfide surface passivation A purely chemical method for forming a layer of insoluble sulfides on semiconductor surfaces in order to passivate their surfaces and more particularly to a method of forming a layer of insoluble sulfides on a HgCdTe device surface.... | 11/22/1994 |
| 5336336 | Process for chemical treatment with phosphate A process for a chemical treatment with a phosphate by bringing a steel material into contact with a phosphate chemical treatment bath maintained at 40° C. or less and containing a phosphate ion, a nitrate ion, a chemical film formable metal ion and an o... | 08/09/1994 |
| 5330588 | Organic-aqueous composition and process for forming corrosion-resistant coatings on metal surfaces A two-part compositional mixture including a non-metallic concentrate with the appropriately blended requisite components in recommended amounts including HNO3 provides a single bath and dip process system. The inventive concentrate is a multif... | 07/19/1994 |
| 5176761 | Process for chemically treating aluminum work pieces Surfaces of structural components made of aluminum or aluminum alloys are chemically treated to produce an aluminum oxide coating for improved adhesive bonding to other components or to other surface layers. The oxidizing is accomplished by exposing the s... | 01/05/1993 |
| 5160381 | Method for forming artificially and rapidly patina on copper, products thereof and solutions therefor A method for artificially forming patina on copper comprising: a) removing any impurity present on the surface of copper substrate; b) polishing the copper substrate with an aqueous solution containing sodium ions, copper ions, acetate ions, chlorine ions... | 11/03/1992 |
| 5089349 | Compositions and method for applying coatings to metallic surfaces Compositions and method for applying a coating to a metallic surface characterized by the presence of tellurium and/or selenium.... | 02/18/1992 |
| 5078812 | Method for darkening a color-selection electrode A method for making a dark, adherent coating on exposed metal surfaces of a color-selection electrode assembly of a CRT includes the steps of applying a first solution of aqueous phosphoric acid to the metal surfaces of the assembly; contacting the metal ... | 01/07/1992 |
| 5051141 | Composition and method for surface refinement of titanium nickel A composition for use in the physicochemical surface refinement of objects having surfaces of titanium, nickel, and alloys of each, normally in a vibratory mass finishing process, comprises the combination of sulfamic acid, ammonium bifluoride, and hydrog... | 09/24/1991 |
| 4994521 | Persulfate activated autodepositing composition An autodepositing coating composition for coating metallic surfaces comprising resin, persulfate, and optionally, fluoride, and having a pH of at least about 6.... | 02/19/1991 |
| 4876222 | Semiconductor passivation A method of passivation of Hg1-x Cdx Te and similar semiconductors by chemical reaction to either sulfide or selenide or a combination of both with an oxidizer such as polysulfide or polyselenide ions in solution.... | 10/24/1989 |
| 4789409 | Black conversion coating A black conversion coating for substrates contains sodium thiosulfate, nickel sulfate (pentahydrate), zinc sulfate (monohydrate), and sodium fluoborate. The coating comes in a powdered formulation in which the sodium thiosulfate, nickel sulfate, zinc sulf... | 12/06/1988 |
| 4728365 | Room temperature blackening solution A room temperature black coating for ferrous metal is formed in a solution based on selenium dioxide, an inorganic copper salt and an organic acid. The solution virtually eliminates the formation of a selenium iron precipitate which results from conventio... | 03/01/1988 |
| 4642140 | Process for producing chalcogenide semiconductors A process for producing chalcogenide semiconductor material is disclosed. The process includes forming a base metal layer and then contacting this layer with a solution having a low pH and containing ions from at least one chalcogen to chalcogenize the la... | 02/10/1987 |
| 4596611 | Corrosion resistant steel components and method of manufacture thereof A non-alloy steel component is nitrocarburized at 550° to 720° C. for up to 4 hours in a nitriding gaseous atmosphere e.g. ammonia or ammonia and endothermic or exothermic gas, and is thus exposed to air or other oxidizing atmosphere for 2 to 120 second... | 06/24/1986 |
| 4582588 | Method of anodizing and sealing aluminum The disclosure relates to a method of sealing the surface of an aluminum member, such as an aluminum foil, from the environment by first placing the foil in an H2 SO4 bath to form an oxide which normally will not provide a total seal... | 04/15/1986 |
| 4548672 | Process for treating the surface of valve metals with chalcogens The invention relates to a process for treating the surface of valve metals, in particular niobium and tantalum, in the form of agglomerated or non-agglomerated powders, thin foils or molded articles prepared from powder, for use as electrolytic capacitor... | 10/22/1985 |
| 4544463 | Method for producing equiaxed iron or iron alloy particles A method is disclosed for producing iron or iron alloy particles. A metal or metal alloy strip having fine particles of iron or alloy distributed throughout is provided. The metal strip is selectively dissolved without substantial dissolving of the iron o... | 10/01/1985 |
| 4447274 | Conductor powders Nickel powders having an improved chemical stability are formed by reaction with an electroconductive coating such as a carbide, a silicide, or the like and, also, a reaction with sulfur.... | 05/08/1984 |
| 4444600 | Process for making a selective absorber for a solar collector and selective absorber obtained The invention concerns a fabrication process for a selective absorber of a solar collector to achieve a solar-radiation collection-surface with high absorptivity and low emissivity. The collector surface is made of an iron alloy containing chrome and is i... | 04/24/1984 |
| 4435227 | Method of treating steel surfaces to prevent wear, and coating obtained thereby An object of the present invention is a method for the anti-wear treatment of the surface of steel parts having a carbon content of at least 0.15% and the coating obtained thereby. The method is characterized by the fact that an addition of sulfur, by dep... | 03/06/1984 |
| 4389459 | Conductive coatings for metal substrates A metal substrate is described herein, the metal substrate being one formed by contacting a metal surface, such as zinc, with a solution containing 0.1 to 2.5 weight percent salt selected from the group consisting of iron nitrate, nickel nitrate and coppe... | 06/21/1983 |
