Stabilized nitrile polymers
CA 1058795 A · Owner: The Standard Oil Company · Inventors: Wardlow, Eddie (Jr.); Uebele, Curtis E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Nitrile copolymers and graft copolymers containing a high proportionate amount of olefinic nitrile are stabilized against thermal color degradation by inclusion into the polymer minor amounts of a compound having the formula:, and/or, wherein "X" may be oxygen; an imide groups -NH? or an, N-substituted imide group, -NR- wherein "R" may be an alkyl or a phenyl alkyl group containing from 1 to 8 carbon atoms; "Y" may be an oxygen or a methylene group; and "Z" may be hydrogen or an alkyl group containing from 1 to 8 carbon atoms.
Read the whole patent
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 July 17, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 17, 1996.
- 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.