Expired Canadian patentCanada
Bicyclic amide acetal/polyamine/polyisocyanate polymers
CA 1237234 A · Owner: Ashland Oil Inc. · Inventors: Goel, Anil B.; Tufts, Timothy A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is described for preparing novel polymers having good impact resistance and other desirable physical properties, said process comprising interpolymerizing a mixture of a bicyclic amide acetal a polyamine and a polyisocyanate. 13
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 May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 4, 1986
GrantedMay 24, 1988
Term endedMay 24, 2005
Patent numberCA 1237234 A
Classification (IPC)C08G18/38 +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.