Expired Canadian patentCanada
Granite-look acrylonitrile/styrene/acrylate copolymers and process for their preparation
CA 2133807 C · Owner: Basf Corporation · Inventors: Kogowski, Gary John
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Granite-looking acrylonitrile/styrene/acrylate copolyners are provided by incorporating into the copolymer a colorant mixture comprising colored polyester or nylon, fibers, titanium dioxide and a metal salt of an aliphatic carboxylic acid as a dispersant.
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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
- Filed October 6, 1994 and granted December 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 6, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2016.
- 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 6, 1994
GrantedDecember 14, 1999
Term endedOctober 6, 2014
Patent numberCA 2133807 C
Classification (IPC)C08L33/20 +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.