Expired Canadian patentCanada
Polymerization of vinyl chloride using an in-situ initiator and a basic calcium compound as a buffer
CA 877400 A · Owner: The Goodyear Tire And Rubber Company · Inventors: Edwin S. Smith
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 3, 1971. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 3, 1988.
- 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 3, 1971
Term endedAugust 3, 1988
Patent numberCA 877400 A
Classification (IPC)C08F14/00 +2 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.