Stable silane compositions on silica carrier
CA 2228625 C · Owner: Osi Specialties, Inc. · Inventors: Guillet, Antoine; Gauthier, Remy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention discloses blends of silanes and specific silicas characterized in that when the blend is compounded into a rubber formulation even after 4, months of storage following formation of the blend an unexpectedly high , proportion of the silane present is available as a coupling and reinforcing agent for the rubber formulation. Over 80% and even over 90% of the silane can be extracted or desorbed from the blend, even 4 months after formation of the blend and rubber formulation properties , indicate high availability of the silane for coupling and reinforcement.
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, 1996 and granted November 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 16, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 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.