Polymer composition
CA 2021497 A1 · Owner: Bath, Colin · Inventors: Bath, Colin; Bath, Colin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polymer composition comprises an olefin polymer a, carboxylic acid compound which contains at least three carbon atoms together with a quaternary ammonium salt wherein at least one substituent on the nitrogen atom is an alkyl group containing at least eight carbon atoms. The olefin polymer may be an ethylene polymer, a propylene polymer or copolymers thereof. The carboxylic acid may be an aliphatic diacid such as succinic acid. The quaternary ammonium salt may be a halide or sulphate. The quaternary ammonium group generally contains two or preferably only one alkyl group having at least eight carbon atoms. Other substituents in the quaternary ammonium group can be methyl benzyl or poly …
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 July 19, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.