Polymers containing amino groups, and their preparation
CA 1267248 C · Owner: Bronstert, Klaus · Inventors: Bronstert, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
17 - O.Z 0050/37904, Abstract of the Disclosure: Homopolymers copolymers and/, or block copolymers which are obtained from vinylaromatics and/or dienes, are modified with functional amino groups and contain functional groups of the formula (I) or (II), , or, (I) (II), where N is nitrogen R1 and R2 are each alkyl or aryl, A, is an unsubstituted or substituted one-membered carbon bridge, Me is an alkali metal and B is a 2-membered to 12membered carbon bridge in which at least the members adjacent to the nitrogen atoms consist of -C(R3,R4) radicals where R3 and R4 can be identical or different and are each hydrogen, alkyl, cycloalkyl or aryl, and the more remote members can be not only …
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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 March 27, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 2007.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.