Nitrogen-containing titanocenes, and the use thereof
CA 2017934 C · Owner: Novartis Ag · Inventors: Beyeler, Harry; Steiner, Eginhard; Husler, Rinaldo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Titanocenes of the formula I, (see formula I) in which R1 are cyclopentadienyl~ groups and R2 and R3 are aromatic radicals which are, substituted in both ortho-positions by fluorine and in addition, are , substituted by a, pyrrylalkyl group amidoalkyl group or imidoalkyl group, are suitable as photoinitiators, for the photopolymerization of ethylenically unsaturated compounds.
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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 May 30, 1990 and granted January 2, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2012.
- 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.