Expired Canadian patentCanada
Resin composition
CA 2000803 C · Owner: Kato, Yasushi · Inventors: Kawamura, Jo; Furukawa, Hisao; Kato, Yasushi
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 resin composition comprising 5 to 100 % by weight of a vinyl copolymer comprising 0.1 to 99 % by weight of units having the formula (I): ( I), The composition of the invention is excellent in weatherability.
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 October 16, 1989 and granted April 1, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 16, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 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.
FiledOctober 16, 1989
GrantedApril 1, 1997
Term endedOctober 16, 2009
Patent numberCA 2000803 C
Classification (IPC)C08F20/36 +2 more
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.