Polymeric reaction products
CA 2083466 A1 · Owner: Huemke, Klaus · Inventors: Gilbert, John A.; Huemke, Klaus; Faul, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
23 - O.Z. 0062/02125, Abstract of the Disclosure: Polymeric reaction products are obtainable by reacting, I) prepolymers obtainable from A) polyoxyalkylenes which have an average molecular weight ?n of from 140 to 10,000 and contain on average from 1.5 to 3.0, a1) primary or secondary amino groups or a2) epoxy groups, per molecule and, B) polymers which are based on conjugated dienes have an average molecular weight ?n of from 250 to 50,000 and contain on average from 1.5 to 3.0 b1) primary or secondary amino groups or b2) epoxy groups, per molecule, the components (a1) and (b2) or (a2) and (b1) being reacted with one another so that from at least an amino equivalent excess to 3 amino …
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 November 20, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 20, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2014.
- 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.