Expired Canadian patentCanada
Heterocyclic compounds
CA 1056830 A · Owner: Imperial Chemical Industries Limited · Inventors: Williams, Barry; Brooks, John L.; Eaton, David C.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The compound of the formula is exceptionally useful as an agent for increasing the bond strength between rubber and copper or its alloys.
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 June 19, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 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.
Filed—
GrantedJune 19, 1979
Term endedJune 19, 1996
Patent numberCA 1056830 A
Classification (IPC)C07D251/42 +1 more
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.