Use of copolymers derived from polyamides as gelling agents for compounds with low polarity
CA 2410477 A1 · Owner: Morvan, Mikel · Inventors: Bodrero, Sylvie (Deceased); Canivenc, Edith; Morvan, Mikel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns the use of copolymers comprising at least polyoxyalkylene polyamide functions as gelling agents for compounds with low polarity or ionic surfactants. Said sequence copolymers comprise the following units: -X-(R?1¿)¿m?-(OA)¿n?-X- (I) and -NH-R?2¿-NHCO-R'?2¿-CO¿r? (IIa), and/or -NH-R?3¿-CO¿s?- (IIb) and -OC-R?4¿-CO- (III) units wherein R?1¿ R'?1¿, R?2¿, R'?2¿, R?3¿ and R?4¿ represent a hydrocarbon radical; X corresponds to the terminal function of said unit after reaction with an amine function or carboxylic acid; OA an oxyethylene, oxypropylene and/or oxybutylene radical; m is equal to 0 or 1; n is an integer ranging between 4 and 800; r and s are such that the number …
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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 March 20, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 20, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 20, 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
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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.