Preparation and the use of halopropargylated cyclic quaternary ammonium compounds as antimicrobial agents
CA 2080541 A1 · Owner: Hsu, Adam C. · Inventors: Hsu, Adam C.
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 (I), wherein, R is selected from (C1 to C20) straight or branched alkyl optionally substituted with hydroxy, halogen alkoxy, phenoxy, or -C(=O)R wherein R' is selected from (C1-C20)alkyl (C1-C20)alkoxy, phenox, phenyl; benzyl; phenethyl; cyanoethyl; 2-cyanoethyl; propargyl; and allyl;, X = halogen (chlorine, bromine or iodine), phosphate, acetate, benzoate citrate, tartrate, alkyl- or aryl-sulfonate alkylsulfate; and, represents a 3- to 7-membered ring that contains at least one nitrogen atom or addition to said one nitrogen atom, selected from sulfur oxygen, and a, second nitrogen;, are disclosed. Processes for inhibiting microbial growth and …
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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 14, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 14, 2014.
- 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.