Expired Canadian patentCanada
Copolymers based on one or many ethylenic monomers and at least one mono, bisor tris hydroxymethylphenyloxyally lether and a process for their preparation
CA 1293585 C · Owner: Societe Chimique Des Charbonnages S.A. · Inventors: Aubry, Jean; Cassiani-Ingoni, Serge; Hauschild, Remi
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
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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 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 25, 1987
GrantedDecember 24, 1991
Term endedDecember 24, 2008
Patent numberCA 1293585 C
Classification (IPC)C08L61/00 +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.