Compounds useful as detergent additives for lubricants and lubricating compositions
CA 1292241 C · Owner: Koch, Paolo · Inventors: Di Serio, Alfonso; Koch, Paolo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The alkali metal and alkaline-earth-metal salts are disclosed of a monoester of a bicarboxy acid having the formula:, wherein R is alkyl, R1 is either hydrogen or alkyl R2 is, alkyl and A is a single bond or alkylene said alkyl, containing each respectively from 1 to 30 carbon atoms and, said "alkylene" meaning an alkylene radical containing from 1 to 30 carbon atoms with the proviso that: a) the sum of carbon atoms contained in R, A, R1 and R2 radicals is equal to, or greater than 15; and b) when A is a single bond the, sum of carbon atoms contained in R1 and R2 is less than 50; and the corresponding hyperbasic derivatives useful as, detergent additives for lubricants. Also the lubricating …
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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 November 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 2008.
- 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
Timeline From CIPO dates
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.