Expired Canadian patentCanada
Bicyclic acrylic monomers
CA 1256445 A · Owner: Armstrong World Industries, Inc. · Inventors: Setthachayanon, Songvit; Herweh, John E.; Echterling, Garry K.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Disclosed are bicyclic acrylic monomers and, polymers and copolymers derived therefrom.
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 June 27, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 27, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 17, 1986
GrantedJune 27, 1989
Term endedJune 27, 2006
Patent numberCA 1256445 A
Classification (IPC)C07D493/18 +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.