Permanent antistatic resin composition
CA 2030916 C · Owner: Katoh, Makoto · Inventors: Noda, Tetuji; Katoh, Makoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A permanent antistatic resin composition which comprises 100 parts by weight of a block copolymer and from 0.1 to 2.0 parts by weight of an antistatic agent said block copolymer comprising polymer blocks of a vinyl aromatic compound, polymer blocks of a conjugated dime compound and polymer blocks of a lactone compound wherein the content of the vinyl aromatic compound is from 10 to 100% by weight and the content of the conjugated diene compound is from 0 to 90% by weight provided that the sum of the vinyl aromatic compound and the conjugated diene compound is from 30 to 99% by weight, and the content of the lactone compound is from 1 to 70% by weight.
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 November 27, 1990 and granted June 13, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 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.