Thermosetting organopolysiloxane composition
CA 2056200 A1 · Owner: Hasegawa, Chi-Ichiro · Inventors: Hamada, Mitsuo; Yoshikawa, Tomoji; Hirono, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A thermosetting organopolysiloxane composition which cures to an elastomer having unusually high fatigue resistance is produced by mixing a vinyl group-containing organopolysiloxane gum, a microparticulate silica having a specific surface area of at least 250 m2/g and bearing no more than 0.50 weight percent water a hydroxyl, group-endblocked organopolysiloxane preferably having vinyl groups, and a curing agent. Flexural life under constant elongation of over 400 x 104 cycles are shown.
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, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 2013.
- 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.