Polyester containing tertiary carboxyl groups, preparation method and thermosetting powder compositions containing same
CA 2320344 A1 · Owner: Moens, Luc · Inventors: Buysens, Kris; Maetens, Daniel; Moens, Luc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a polyester bearing tertiary carboxyl groups characterised in that it consists of: (a) 8.1 to 35 moles of an aliphatic or cycloaliphatic of a polyol; (b) 9.1 to 36 moles of an aliphatic cycloaliphatic or aromatic polycarboxylic acid; (c) 1.6 to 2.8 moles of an aliphatic cycloaliphatic or aromatic compound comprising a tertiary carboxyl group and either a primary or secondary carboxyl group or a primary or secondary hydroxyl group. Said polyester is prepared in several steps the first steps consisting in the preparation of a polyester by condensation between (a) an aliphatic or cycloaliphatic polyol and (b) an aliphatic, cycloaliphatic or aromatic polycarboxylic acid …
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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 February 3, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 3, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 3, 2021.
- 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.