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| Number | Title | Issue Date |
| 4032359 | Removal of aluminium rich coatings from heat resisting alloys A solution for removing a diffused aluminium coating from a component made of nickel or cobalt base high temperature alloy, consisting of Nitric Acid 57%, Sulphuric Acid 29% and Water 14%. The solution removes all but traces of nickel or cobalt-rich alumi... | 06/28/1977 |
| 4025358 | Process for currentless separation of a nickel layer from objects of light metal A process for currentless separation of a nickel layer from nickel-coated objects of light metal. An acid bath is used consisting of nitric acid and hot water in which metallic copper is placed.... | 05/24/1977 |
| 4025359 | Inhibited acid composition for cleaning water systems A pipe cleaning composition containing hydrochloric acid, furfural, dialkylthiourea, and water has a reduced tendency to attack galvanized pipe or steel pipe.... | 05/24/1977 |
| 4022703 | Stabilization of hydrogen peroxide in acid baths for cleaning metals Hydrogen peroxide-containing acidic baths for pickling metals, the bath compositions being stabilized according to the invention so that the baths can be used over long periods of time without appreciable decomposition of hydrogen peroxide, such baths con... | 05/10/1977 |
| 4021264 | Method of dissolving a silver coating in a photo tank Silver coatings in photographic tanks are dissolved with an aqueous solution of an alkali mono or di peroxysulfate, an alkali bisulfate and thiourea.... | 05/03/1977 |
| 4014804 | Corrosion removal composition A composition comprising 2 to 10% by weight of a sulfate of copper, 0.05 to 1.0% by weight of an alkali metal bichromate, 0.05 to 1.0% by weight of a surfactant, 15 to 35% by weight of phosphoric acid (based on contained phosphoric acid) and 50 to 85% by ... | 03/29/1977 |
| 4014715 | Solder cleaning and coating composition Relates to a composition and method for cleaning and coating metal surfaces comprising a mineral acid, a phosphoric acid concentrate having a P2 0.sub. 5 content of about 72-80% formed by heating 54% phosphoric acid with a mono- or polysacchari... | 03/29/1977 |
| 4013579 | Acidic cleaning composition An acidic cleaning composition comprising at least 0.1 weight percent of at least one member selected from the group consisting of furan-carboxylic acid and derivatives thereof having the following formula I and tetrahydrofuran-carboxylic acid and derivat... | 03/22/1977 |
| 4011097 | Method of removing iron sulfide and sludge from metal surfaces A water-soluble composition capable of removing iron sulfide and sludge from metal surfaces and a method of such removal of iron sulfide and sludge from metal surfaces, particularly in a glycol system, the composition comprising: A. from about 2 to about ... | 03/08/1977 |
| 4009115 | Composition and method for cleaning aluminum at low temperatures Acid cleaning of aluminum surfaces is accomplished employing a composition comprising Hydrofluoric acid and Sulfuric acid. More specifically, this invention relates to a composition and method for treating aluminum containers at low temperatures.... | 02/22/1977 |
| 4004066 | Method of protecting concrete Concrete is protected from attack by organic lubricants by treating it with an aqueous solution of citric acid.... | 01/18/1977 |
| 4002489 | Method of pickling metallic material A method of pickling metallic material particularly for the continuous treatment of material in strip or wire form and especially such material consisting of stainless steel, wherein the material after annealing is subjected in a first step to the chemica... | 01/11/1977 |
| 3997460 | Liquid abrasive cleaner The invention relates to a surface adherent abrasive liquid cleaner which is especially useful for removing hard water, iron and organic stains as might be found in toilet bowls. The cleaner includes a mineral acid such as hydrogen chloride to aid in diss... | 12/14/1976 |
| 3997459 | Denture cleaning composition A denture cleaning composition comprises an acidic component which gives an acidic solution when the composition is mixed with water and a neutralizing component having a protective coating which causes the neutralizing component to be released over an in... | 12/14/1976 |
| 3997361 | Coin cleaner A two-constituent combination of phosphoric and nitric acids with a minimal volume of water. The composition is designed to remove stains, corrosion, dirt and encrustations from coinage metals composed mainly of copper, silver, brass, bronze and gold. No ... | 12/14/1976 |
| 3996148 | Basic detergent for liquid lyes A process for the manufacture of a basic detergent comprising the reaction without heating, of carboxylic aliphatic diacid of C6 to C8, with a compound of nitrogen selected in the group consisting of ammonia and primary, secondary or... | 12/07/1976 |
| 3996062 | Method for removing scale from metallic substrates Iron containing scale is removed from a metallic substrate by contacting the scale with a composition which is an aqueous solution consisting essentially of at least 0.5 weight percent of a polyphosphonic acid, or an alkali metal or amine salt of such aci... | 12/07/1976 |
| 3993730 | Purification of coke oven gas with production of sulfuric acid and ammonium sulfate A continuous process is provided which has the primary purpose of removing NH3, H2 S, HCN, and (CN)2 from the subject gas mixtures and the secondary purpose of producing (NH4)2 SO4 and iron ... | 11/23/1976 |
| 3992313 | Acid inhibitor composition and process in hydrofluoric acid chemical cleaning A Mannich base and thiourea inhibitor composition and method of inhibiting the acid attack by aqueous hydrofluoric acid on ferrous metal surfaces, and in particular, highly reactive ferrous metal surfaces.... | 11/16/1976 |
| 3990908 | Desizing glass fabric with sodium carbonate peroxide desizing solutions Desizing glass fabric by dampening sized glass fabric with an aqueous desizing solution containing 1.0 to 18.0 g/l sodium carbonate peroxide to provide about 0.03% to about 0.50% sodium carbonate peroxide on the fabric based on the weight of the dry fabri... | 11/09/1976 |
| 3988254 | De-smutting agent A de-smutting agent comprising an aqueous solution containing a water-soluble hydrogen peroxymonosulfate and a water-soluble hydrogen sulfate and a method for removing smut from aluminum.... | 10/26/1976 |
| 3969135 | Low temperature aluminum cleaning composition and process Aluminum surfaces are cleaned at low temperature by the addition of a polyalkylene glycol-abietic acid surfactant and a polyalkylene glycol-hydrocarbon surfactant to an aqueous acidic solution. Preferably, the solution contains fluoride as an accelerator.... | 07/13/1976 |
| 3968048 | Drain cleaning compositions A granular drain cleaning composition which remains physically separated in two parts until utilization in the presence of water, useful for freeing a clogged drain of grease, hair, oils, and other debris is disclosed. One part contains an alkali metal hy... | 07/06/1976 |
| 3961982 | Method of removing silver images from aluminum lithographic plates A coherent silver image which is bonded to the grained surface of an aluminum lithographic plate having an aluminum oxide layer thereon is transformed into a hydrophilic non-image area by contacting the silver image with a viscous composition comprising a... | 06/08/1976 |
| 3962108 | Chemical stripping solution A stripping solution comprising between 80 and 98% H2 SO4, between 0.5 and 4% HClO4, between 0.5 and 4% CrO3 and H2 O. The principal application of the solution is to remove polymerized photoresist la... | 06/08/1976 |
| 3960680 | Treatment of catalytic anodes A process for the removal of barium containing scale from anodes which comprises treating the anodes with sulphuric acid containing not more than 10 per cent by weight of water, eg by treating with concentrated sulphuric acid at ambient temperature. The i... | 06/01/1976 |
| 3958984 | Method of removing a brazing alloy from stainless steel A method of removing high temperature brazing alloys from a stainless steel base wherein the brazing alloy is treated with an aqueous solution of an alkali cyanide and a nitro-substituted aromatic compound and also with an acid solution containing a minor... | 05/25/1976 |
| 3957529 | Method for cleaning and passivating a metal surface A cleaning solvent useful in the cleaning of metal surfaces, e.g. nickle-iron alloys, contains sulfamic acid, citric acid, a solvent for hydrocarbon residues, and a surfactant. Metal surfaces are cleaned by contacting the surface with the cleaning solvent... | 05/18/1976 |
| 3954644 | Flexible contact lens cleaning, storing, and wetting compositions A contact lens cleaning, storing and wetting solution is provided for cleaning, storing and wetting flexible silicone contact lenses. The solution comprises a poly (oxyethylene)- poly (oxypropylene) block copolymer having a molecular weight between about ... | 05/04/1976 |
| 3954645 | Additive for an acid cleaning bath for metal surfaces A method for the preparation of a liquid concentrate solution containing 10 to 60 percent by weight water from which a metal cleaning solution may be prepared by dilution with additional water. The liquid concentrate was prepared from ferrous sulfate, an oxida... | 05/04/1976 |
| 3953263 | Process for preventing the formation of nitrogen monoxide in treatment of metals with nitric acid or mixed acid The formation of nitrogen monoxide in treatment of metals with nitric acid or a mixed acid can be prevented by adding at least one of ammonium peroxodisulfate and hydrogen peroxide to nitric acid or a mixed acid consisting mainly of nitric acid and sulfur... | 04/27/1976 |
| 3936316 | Pickling solution The invention is for a process and composition for pickling metals, especially iron based metals, prior to metal finishing. A hydrohalide acid pickling solution is used which solution is characterized by the addition of urea. The urea substantially reduce... | 02/03/1976 |
| 3935215 | Process of reverting thiophosphates Thiophosphates of the formula ##EQU1## where X is 0 or S, R is a hydrocarbon or a substituted hydrocarbon group such as alkyl, aryl, cycloalkyl, alkaryl, aralkyl, etc., and R' is a 3-thione-propene-1 or a substituted 3-thione-propene-1 group; the ... | 01/27/1976 |
| 3932243 | Cleaning and polishing compound for barrel and vibratory finishing of ferrous and non-ferrous metals A formulation for the surface treatment of metal articles wherein the article to be treated is immersed and agitated in a working solution of the formulation. The formulation consists essentially of the esterification reaction product of phosphoric acid b... | 01/13/1976 |
| 3932296 | Corrosion inhibitor The corrosion inhibitor of the present invention comprises a mixture containing (a) the reaction product of a nitrogen containing compound containing at least one active hydrogen attached to the nitrogen atom per molecule; a ketone having at least one hyd... | 01/13/1976 |
| 3930870 | Silicon polishing solution preparation An improved process for preparing a polishing solution for use in the chemical-mechanical polishing of silicon comprising copper nitrate, ammonium fluoride, nitric acid and ammonium nitrate. The latter two components are added to the copper nitrate, the s... | 01/06/1976 |
