Expired Canadian patentCanada
Process for the production of foamed substances based on isocyanate-modified polyesters by using compounds which split off formaldehyde
CA 588792 A · Owner: Mobay Chemical Company · Inventors: Herbert Barth; Hans Holtschmidt; Franzkarl Brochhagen
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 December 15, 1959. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 1976.
- 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—
GrantedDecember 15, 1959
Term endedDecember 15, 1976
Patent numberCA 588792 A
Classification (IPC)C08G
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.