N,n-dialkylaminoalkyl(meth)acrylamide composition with improved storability
CA 2026439 C · Owner: Yasutaka, Doi · Inventors: Hiroshi, Oka; Yasutaka, Doi; Takashi, Maruyama
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a composition of an N,N-dialkylaminoalkyl(meth)acrylamide of the following general formula (II), which has an improved storability and which contains an N,N-dialkylhydroxylamine of the following general formula (I) in an amount of from 10 to 10,000 ppm. (see fig. I) where R1 and R2 independently represent an alkyl group having from 1 to 4 carbon atoms. (see fig. II) where R3 represents a hydrogen atom or a methyl group; R4 and R5 independently represent an alkyl group having from 1 to 4 carbon atoms; and, n represents an integer of from 2 to 4. The N,N-dialkylaminoalkyl(meth)acrylamide composition of the present invention forms an extremely reduced amount of …
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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 January 30, 1990 and granted June 1, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2012.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.