Polyesters containing (meth)acrylate end groups
CA 2367068 A1 · Owner: Siol, Werner · Inventors: Pokinskyj, Peter; Siol, Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention describes polyesters containing (meth)acrylate end groups of the general formula (I) CH2=CRCOO-PE-OCOCR=CH2 where R = CH3 or H, where PE = -A-OCO-B-COO-m-A- -CHR'-COO-n-, A--OCOCHR'-n, in which A is an alkylidene radical having 2-20 carbon atoms or an alkoxylidene radical having 2-1000 alkoxylidene units B is a, saturated alkylidene radical having 2-10 carbon atoms R' is H or CH3, m is, 0-100, n is 0-100 with the proviso that the sum m + n is 2-200 where the, polyesters containing (meth)acrylate end groups are characterised in that a) the content of short-chain di(meth)acrylates (II) CH2=CRCOO-A- OCOCR=CH2 is < 5% by weight, b) the content of hydroxyl groups is < 0.25 mol/mol …
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 January 10, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 10, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2024.
- 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.