Insulators
CA 2117501 C · Owner: Hirai, Kazuo · Inventors: Baba, Katsuya; Matsushita, Takao; Nakajima, Isao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An insulator includes a housing portion. The housing portion is composed a silicone rubber obtained by curing a composition containing diorganopolysiloxane (A) and a fine silicon powder (B) by heating and a methylalkylpolysiloxane oil (C). The diorganopolysiloxane has at least two silicon atom- bonded alkenyl groups in one molecule. The methylalkyl- polysiloxane oil (C) has each of both terminal ends of each molecular chain blocked with a trialkylsiloxy group and possessing a viscosity at 25°C being 1 to 1,000 centistokes and is incorporated into the above composition in an amount of 1-100 parts by weight per 100 parts by weight of the component (A).
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 August 16, 1994 and granted March 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 16, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 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.
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.