Branched polyesters
CA 1262992 C · Owner: Ciba-Geigy Investments Ltd. · Inventors: Lauterbach, Horst; Renner, Alfred; Mulhaupt, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Branched polyesters, Abstract of the Disclosure The invention relates to compounds with structures of the formulae I to IV, (I), (II), (III), (IV), in which formulae Tr is a radical of formula V or VI, (V) (VI), A is -O- or -NR1-, R1 is hydrogen or a monovalent organic radical X is a di- or trifunctional radical of a hydroxycarboxylic or aminocarboxylic acid after removal of the functional groups R2, if m is 1, has one of the meanings of R1 or R2, if m 13 2, is a, free electron pair R is the radical of a diol after removal of the two hydroxyl groups Y is the radical of a dicarboxylic acid after removal of the two carboxyl groups, Z has one of the meanings of Y but may additionally also …
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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 November 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 14, 2006.
- 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.