Expired Canadian patentCanada
Interpolymers of styrene, allylic fumarate, and allylic alcohol
CA 476447 A · Owner: Dominion Rubber Company · Inventors: Charles Adam Heiberger
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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 August 28, 1951. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 28, 1968.
- 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—
GrantedAugust 28, 1951
Term endedAugust 28, 1968
Patent numberCA 476447 A
Classification (IPC)C08F222/00 +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.