Non-migrating 1-hydrocarbyloxy hindered amine compounds as polymer stabilizers
CA 2012507 C · Owner: Ravichandran, Ramanathan · Inventors: Mar, Andrew; Galbo, James P.; Schirmann, Peter J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1-Hydrocarbyloxy substituted hindered amine compounds which also contain a reactive functional group such as hydroxy amino, oxirane or carboxyl can be chemically attached to selected polymer substrates by condensation reactions to give polymers containing a chemically-bonded non-migrating, stabilizer having excellent stabilization efficacy for protecting said polymer substrate from the adverse effects of actinic light. The hindered amine compounds have one of the formulae I, II, III, IV and V:, (see formula I II and III), (see formula IV and V), wherein G1 and G2 are groups such as methyl;, E is a group such as C1-C18 alkyl; T is a direct bond or a group such as -CO(CH2)min which m is 2 or …
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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 19, 1990 and granted November 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 19, 2012.
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