Adhesion promoters
CA 2018665 C · Owner: Parrinello, Giovanni · Inventors: Parrinello, Giovanni; Simon, Hubert; Mulhaupt, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of general formula I, (see formula I) wherein, R1 is C2-C3alkylene, R2 is hydrogen unsubstituted C1-C6alkyl or C1-C6alkyl substituted by -OH -CN , or by, -Si(OR3)3-q R4q, or C2-C6alkenyl R3 is C1-C4alkyl, or two radicals R3 together are C1-C4alkylene R4 is C1-C4alkyl or phenyl, and, q is from 0 to 2 and, E is a radical of the formula, (see formula II) wherein, R5 is hydrogen or C1-C4alkyl and R6 is hydrogen, or, R5 and R6 together are C4-C8alkylene or, E together with R2 is a radical of the formula (see formula III), wherein, R7 is hydrogen C1-C4alkyl or -R9-Si(OR3)3-q R4n, wherein R3 R4 and q are as , defined, above and, R9 is C1-C8alkylene and, R8 is a radical, R10 is hydrogen …
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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 June 11, 1990 and granted November 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 11, 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.