One-component polyurethane compositions with improved curing
CA 2309488 A1 · Owner: Vogel, Peter · Inventors: Vogel, Peter; Heimpel, Franz; Huber, Silvia
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A one-component polyurethane foam composition is described which contains at least one prepolymer (isocyanate prepolymer) which has, isocyanate groups, at least one blowing agent and known auxiliary and additive materials containing at least one ester free of reactive hydrogens, of a, polycarboxylic C2 to C7 acid and a monohydric C1 to C7 alcohol and/or a monocarboxylic C1 to C7 acid with a multihydric C2 to C7 alcohol as means for improving the complete and embrittlement-free curing even at low temperatures and/or low ambient humidities, as well as the use of these esters which are , free, of reactive hydrogen atoms for improving the embrittlement-free curing of such, one-component …
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 May 26, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 26, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 2022.
- 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.