4-vinylpyridine polymethacrylate containing lube oil compositions
CA 1078366 A · Owner: Texaco Development Corporation · Inventors: Yamamoto, Roy I.; Gaetani, Frank J.; Cusano, Carmen M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
4-VINYLPYRIDINE POLYMETHACRYLATE CONTAINING LUBE OIL COMPOSITIONS, (D#74,680-F), ABSTRACT OF DISCLOSURE A fully formulated crankcase lubricating oil composition containing between about 0.1 and 10 wt. % of a tetrapolymer of 4-vinylpyridine (4-VP) a first alkyl meth-, acrylate of the formula: a second alkyl methacrylate of the formula: and a third alkyl methacrylate of the formula: where R is alkyl of from 1 to 6 carbons R1 is alkyl of from, 10 to 15 carbons and R2 is alkyl of from 16 to 20 carbons of, a molecular weight between about 25,000 and 2,500,000 having a component ratio of 4-VP:C1 to C6 alkyl methacrylate:C10-C15 alkyl methacrylate:C16-C20 alkyl methacrylate of between about …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 27, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 27, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.