Polysaccharide graft polymers containing acetal groups and their conversion to aldehyde groups
CA 1339137 C · Owner: Tsai, John Ji-Hsiung · Inventors: Tsai, John Ji-Hsiung; Billmers, Robert L.; Jobe, Patrick G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides various novel acetal and aldehyde-containing monomers and polymers prepared therefrom with ethylenically unsaturated monomers. The novel monomers are selected from the group consisting of 22-(1,3-dioxolan-2-yl)-ethoxyethyl methacrylate; N-methyl N-(2,2-dimethoxy)ethyl, N,N-diallylammonium bromide; 2-(5,5-dimethyl-1,3-dioxan-2-yl)ethoxyethyl acrylate; N-2-(5,5-dimethyl-1,3-dioxan-2-yl)ethyl acrylamide; 1-(5,5-dimethyl-1,3-dioxan-2-yl-2-propyl acrylate; 3-N-methyl, N-(2,2-dimethoxy)ethyl-amino-2-hydroxypropyl methacrylate; and N,N-dimethyl, N-3-(2-dioxolan-2-yl) ethoxyethoxy-2-hydroxylpropyl methacrylamidopropylammonium chloride or which has the structure, , where R' is …
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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 July 29, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 2014.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.