Benzoyl-substituted phosphabicycloalkanes and phosphabicyclosufides as photoinitiators
CA 2091326 A1 · Owner: Novartis Ag · Inventors: Leppard, David G.; Hug, Gebhard; Misev, Ljubomir
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A-19017/A, Benzoyl-substituted phosphabicycloalkanes and phosphabicyclosulfides as photoinitiators Abstract of the Disclosure, Compounds of formula I (I), wherein n is 0 or 1, p is a number from 1 to 8 q is 2 or 3, and, R1 is unsubstituted phenyl or phenyl which is substituted by halogen C1-C8alkyl, C1-C8alkoxy, C2-C8alkoxyalkyl or/and C1-C4alkylthio are suitable for use as initiators for photopolymerising compounds containing ethylenically unsaturated double bonds.
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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 March 9, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 9, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 2015.
- 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.