Radiation-sensitive, ethylenically unsaturated, copolymerizable compounds and their preparation
CA 2005283 C · Owner: Boettcher, Andreas · Inventors: Rehmer, Gerd; Boettcher, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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42-, Radiation-sensitive, ethylenically unsaturated compounds and a process for their preparation. The ethylenically unsaturated organic compounds axe of the general formula, (see formula I) where, R is alkyl, aryl or a radical R1 and R1 is a radical, (see formula II), where R2 to R6 are each H alkyl, OH, OAlkyl, SH, SAlkyl, halogen N(Alkyl)2 or N(Alkyl)(Aryl) and at least one but not more than three of the radicals R2 to R6 is or are a radical, (see formula III) (see formula IV) where X is alkylene, cycloalkylene, oxaalkylene or arylene, Y is H or CH3- and Z is O or NY. The novel radiation-sensitive ethylenically unsaturated compounds are suitable for the preparation of polymeric …
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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 December 12, 1989 and granted February 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2011.
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