Silicon powder for preparing alkyl- or aryl-halogenosilanes
CA 2410639 C · Owner: Rhodia Silicones S.A.S. · Inventors: Margaria, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a silicon powder for making alkyl- or aryl-halogenosilanes with particle-size distribution less than 350 µm and containing less than 3 % and preferably less than 2 % of particles having a size less than 5 µm. Said powder enables to improve efficiency of synthesis reaction.
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 May 29, 2001 and granted January 25, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 29, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 2023.
- 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.