Polymers suitable as binders
CA 2104037 A1 · Owner: Fobbe, Helmut · Inventors: Fobbe, Helmut; Knoll, Konrad; Huemke, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel polymers which are suitable as binders are obtainable by reacting (A) a base resin which has an average molecular weight ?w of from 200 to 5,000 and contains on average from 1 to 3 epoxy or isocyanato groups as the reactive groups per molecule, with, (B) a mixture of (B1) 5 to 50% by weight of polyisobutylene which is terminated with primary amino groups and has an average molecular weight ?w of from 500 to 5,000 and, (B2) 5-95% by weight of an amidoamine which carries primary amino groups and is obtainable by condensation of diprimary diamines of 2 to 20 carbon atoms with aliphatic C2-C44-dicarboxylic acids, the amounts being such that from 1 to 5 equivalents of primary amino groups …
Read the whole patent
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 August 13, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 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.