Alkoxy acetic acid derivatives
CA 2252828 A1 · Owner: Sutkowski, Andrew Czeslaw · Inventors: Kendall, David Roy; Naisby, Thomas Webster; Grundy, Michael John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides alkoxy acetic acid derivatives of general formula (I) wherein R is the residue of an amine, an aminoalcohol or a polyol linked to the or each -CHR'-CO- moiety via an amide or ester linkage; R' is hydrogen or a C1-4 alkyl group; R1 is an optionally substituted hydrocarbyl group of 1 to 300 carbon atoms; one of R2 and R3 is independently selected from hydrogen and optionally substituted hydrocarbyl of 1 to 10 carbon atoms the other of R2 , and R3 being independently selected from optionally substituted hydrocarbyl of 1 to 10 carbon atoms; m is from 3 to 200; n is from 0 to 20 provided that m/n , is at least 1; and p is from 1 to 5; a process for their …
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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 April 25, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 25, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 25, 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.