Polymers containing a reactive aromatic system and method for their preparation
CA 1081395 A · Owner: Ceskoslovenska Akademie Ved · Inventors: Plichta, Zdenek; Bleha, Miroslav
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is concerned with polymers containing structural units of the general formula: wherein R1 is hydrogen or a methyl group R2 is an alkyl or, hydroxyalkyl containing 1 to 6 carbon atoms R4 and R5 are the, same or different and represent hydrogen an acyl, sulfate, or hydrochloric group an alkyl containing 1 to 4 carbon atoms or a -CH2COOH group, with the proviso that R5 can represent an acyl sulfate or hydrochloric group only when R4 is hydrogen or R4 and, R5 together with the nitrogen atom to which they are attached form a diazo group, Ar is p-phenylene, and x is 1 to 4. The polymers of the invention are advantageously used as ion exchangers catalysts for chemical reactions, 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
- Granted July 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 8, 1997.
- 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.