Thermoplastic elastomers
CA 2036410 A1 · Owner: Abel, Ulrich · Inventors: Abel, Ulrich; Straehle, Wolfgang; Straehle, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
12 - O.Z. 0050/41420, Abstract of the Disclosures In thermoplastic elastomers selected from the group consisting of the thermoplastic polyurethanes, of the polyetheresters and of the polyetheramides which are derived from polyetherpolycarbonatediols as diol components, the polyetherpolycarbonatediols used are reaction products of phosgene dialkyl carbonates having C1-C4-alkyl groups or cyclic carbonates having C2-C4-alkylene bridges or mixtures thereof with mixtures of, a1) from 10 to 100 mol % of polyoxytetramethylenediol having a number average molecular weight ?n of from 150 to 500 and, a2) from 0 to 90 mol % of polyoxyalkylenediols which differ from a1) and have C2-C8-alkylene 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 February 15, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 2013.
- 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.