Organopolysiloxane compositions which can be crosslinked to give flame-resistant elastomers
CA 2200942 C · Owner: Wacker-Chemie Gmbh · Inventors: Sollradl, Herbert; Balk, Gerhard; Kurz, Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The use is described of boron compounds chosen from the group consisting of boron carbide and metal borides mixed with non-reinforcing fillers with the proviso that at least 75% by weight of the non-reinforcing fillers are heat-stable up to 1200°C, as flameproofing agents in organopolysiloxane compositions which can be crosslinked to flame-resistant elastomers.
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 March 25, 1997 and granted June 18, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2019.
- 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.