Impact-resistant resin
CA 2009053 C · Owner: Ito, Masakazu · Inventors: Sasaki, Isao; Yanagase, Akira; Yamamoto, Naoki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high-impact resin is prepared from a combination of (A) a polyphenylene ether, (B) a styrene polymer and (C) a rubbery elastomer composition having a particle diameter distribution, determined by the histogram method in units of 0.01 µm, such that at least 80% based on the number, of particles have a particle diameter of from 0.03 to 9 µm and that the particle diameter distribution has two peak values: one of from 0.1 to 1 µm and another of from 2 to 8 µm. The rubbery elastomer composition is a blend of 50 - 95 weight% of a rubbery elastomer having a particle diameter distribution such that a peak occurs in the range of 0.1 to 1 µm, with a rubbery elastomer having a particle diameter …
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 January 31, 1990 and granted September 28, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 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.