Process for the preparation of ureidoperoxycarboxylic acids
CA 2055701 A1 · Owner: Mueller, Wolf-Dieter · Inventors: Jaekel, Frank; Naumann, Peter; Reinhardt, Gerd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, Process for the preparation of ureidoperoxycarboxylic acids. A process for the preparation of ureidoperoxycarboxylic acids of the formula, , in which, x is the number 1 or 2 A, if x is 1, is hydrogen, C1-C20-alkyl aryl, preferably, phenyl, or haloaryl, preferably chlorophenyl or, if x is 2, is C1-C20-alkylene or arylene preferably, phenylene, B is a group of the formula , , , or , in which, n is a number from 1 to 20 m is the number 0, 1 or 2, R1 is C1-C20-alkyl and R2 is in each case hydrogen or C1-C20-alkyl which comprises dissolving carbamoyllactams of the formula, , in which x, A and B have the abovementioned meanings, in a one- to six-fold, preferably a one- to three-fold, …
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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 15, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 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
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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.