Unsaturated esters, a process for their preparation and their use for the production of moldings, coatings, grouts and sealants
CA 2073159 A1 · Owner: Buechel, Karl-Heinz · Inventors: Buechel, Karl-Heinz; Pedain, Josef; Meixner, Juergen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mo-3755, LeA 28,481, UNSATURATED ESTERS A PROCESS FOR THEIR, PREPARATION AND THEIR USE FOR THE PRODUCTION OF MOLDINGS, COATINGS, GROUTS AND SEALANTS ABSTRACT OF THE DISCLOSURE, The present invention relates to .alpha..beta.-ethylenically unsaturated polyesters having a molecular weight (Mn) of 300 to 10,000 and containing, a) 5 to 70% by weight of octadienyl groups (calculated as C8H13) incorporated via ether bridges and b) 10 to 65% by weight of ester residues of unsaturated dicarboxylic acids (calculated as C4H2O4). The present invention also relates to a process for the preparation of these unsaturated polyesters and to their use for the production of moldings, coatings grouts and, …
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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 July 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 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
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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.