Thermally stable aminosulfur trifluorides
CA 2248407 C · Owner: Lal, Gauri Sankar · Inventors: Syvret, Robert George; Pesaresi, Reno Joseph Jr.; Lal, Gauri Sankar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an aminosulfur trifluoride having a structure with one or more: (See Formula I), wherein m = 1-5 and R1 and R2 are: (1) when m = 1 individually aryl or meta- or para-substituted aryl radicals in which the meta- or para-substitution is selected from the group consisting of normal and branched C1-10 alkyl trifluoromethyl, alkoxy, aryl C6-10, nitro sulfonic ester, N,N-dialkylamino and halogens; or (2) when m = 1 individually aryl radicals which are fused or linked to one another; or (3) when m = 1, one of R1 and R2 is an aryl radical and the other is an at least 5 membered saturated cyclic hydrocarbon radical having zero to three heteroatoms selected from the …
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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 September 22, 1998 and granted December 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2020.
- 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.