Thermally stable sulfonate compositions
Patent 5023016 Issued on June 11, 1991. Estimated Expiration Date: 
November 22, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 22, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 440872 filed on 11/22/1989US Classes:252/389.52, Zinc or aluminium containing252/75, Organic compounds of nonmetals other than C, H, and O252/387, Anti-corrosion252/389.61, Group IIA metal containing252/389.62, Alkali metal or NH4+ containing252/396, Oxygen organic compound containing508/409With carboxylic acid esterExaminersPrimary: Kyle, Deborah L.Assistant: Fee, Valerie Attorney, Agent or FirmInternational ClassC23F 011/10AbstractA concentrate composition is disclosed which comprises (a) a blend of (i) a metal sulfonate and (ii) an alkali or alkaline earth metal or zinc salt of a carboxylic acid and (b) a carrier. The composition is useful as a rust- and corrosion-inhibitor in a petroleum or synthetic base medium and is capable of maintaining metal sulfonate content at temperatures greater than 150° C., e.g., 200° C., for 20 hours.Other References
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