Process for producing unsaturated quaternary ammonium salts
CA 1309107 C · Owner: Harada, Kazuya · Inventors: Nagatsu, Yoshiro; Harada, Kazuya; Mukouyama, Hideaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
High grade quaternary ammonium salts represented by the following General Formula II:, II (in which R1 represents a hydrogen atom or a methyl group; R2 and R3 independently represents an alkyl group containing 1 to 4 carbon atoms; A represents an oxygen atom or an -NH- group; B represents an alkylene group containing 1 to 4 carbon atoms; R4 represents an alkyl group or a benzyl group; and X- represents a halogen anion) can be produced by reacting a cationic vinyl monomer represented by the following General Formula I: (in which R1, R2, R3, A and B have the same meanings as defined above) with an alkyl halide or an aralkyl halide in a medium consisting of a particular mixture of water and an …
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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
- Granted October 20, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 2009.
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Timeline
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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.