Preparation and use of n-iodopropargyl oxycarbonyl amino acid esters and derivatives as antimicrobial agents
CA 2055353 A1 · Owner: Bowers-Daines, Margaret Marie · Inventors: Bowers-Daines, Margaret Marie; Lange, Barry Clifford
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Antimicrobial compounds of the formula wherein R1 is selected from the group consisting of H lower (C1-C4)alkyl, alkyl aryl, CH2OR, CH2SR and CH(CH3)0R; and, R, R2, and R3 are independently selected from H (C1-C4)alkyl, aryl, arylalkyl, alkaryl and halopropargyl.
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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 November 13, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2013.
- 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.