Catalyst system and components
CA 2244803 A1 · Owner: Crowther, Donna Jean · Inventors: Licciardi, Gary F.; Crowther, Donna Jean; Debolt, Lawrence C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided are organosilane compounds having structure (I) wherein R1 and R2 , are the same or different and are selected from the group consisting of alkyl radicals, cycloalkyl radicals, and polynuclear radicals said polynuclear , radicals having nine or more carbon atoms wherein at least one of R1 or R2 is , a polynuclear radical of nine or more carbon atoms with the proviso that , where either R1 or R2 is indenyl or fluorenyl the other of R1 or R2 is a , substituted or unsubstituted bridged cyclic aliphatic radical or is a polynuclear aromatic radical of ten or more carbon atoms and wherein Ry and Rz are the same or different and each Ry and Rz are selected from alkyl radicals having …
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 February 13, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 13, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 13, 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.