Process for foaming acyloxysilane-containing silicone materials
CA 2234698 C · Owner: Heidelberger Bauchemie Gmbh · Inventors: Hoheneder, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a process for foaming a mixture of a bifunctionally terminated diorganopolysiloxane and a acyloxysilane cross-linking agent, the process comprising adding to the mixture a sufficient amount of a hydrogen carbonate compound to neutralize the acid in a foam composition, wherein the hydrogen carbonate compound has a cation portion comprising an amino nitrogen bearing entirely hydrogen substituents or at least one alkyl substituent.
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 30, 1996 and granted January 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 30, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 2018.
- 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.