Canadian application, no grantCanada
Polysiloxane-polyamide block copolymers
CA 2005161 A1 · Owner: Dow Corning Corporation · Inventors: Cornowicz, Gerald A.; Decker, Gary T.; Lee, Chi-Long
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polysiloxane-polyamide block copolymers are prepared from acid halide and aminophenoxy functional polyorganosiloxane. These block copolymers are hydrolytically stable and exhibit excellent thermal stability.
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
- Filed December 11, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 11, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 11, 1989
GrantedNo grant recorded
Term endedDecember 11, 2009
Patent numberCA 2005161 A1
Classification (IPC)C08G77/45 +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.