Bolaform compounds having glycerol ends, processes for their preparation and uses
CA 2217341 A1 · Owner: Laffitte, Jean-Alex · Inventors: Rivaux, Yvan; Patin, Henri; Brochette, Pascal
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to symmetrical bolaform compounds comprised of a hydrocarbon chain with C6-C32 and two ends comprising one or more glyceryl units. It also relates to two processes for preparing the said compounds one from an alpha,omega-alkanediol and the other from an omega-acetylenic alcohol. The bolaform compounds can be used as surfactants in protein encapsulation or extraction.
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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 October 24, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2019.
- 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.