Saturated polyesters containing imide groups and terminal carboxyl groups
CA 1297626 C · Owner: Ciba-Geigy Ag · Inventors: Gabutti, Claudio Alexander
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
3-16054/=, Saturated polyesters containing imide groups and terminal carboxyl groups, Abstract, Saturated polyesters containing terminal carboxyl groups and, per molecule, at least one side chain containing, imide groups, of the formula I (I), in which R1 and R2, for example, together with the carbon atoms to which they are attached, are a cyclohexane ring and R3 is ethylene, the side chains of the formula I being attached via ester linkages to tribasic or tetrabasic aromatic carboxylic acids present in the polyester main chain the, average molecular weight ?w of the polyester being between 3000 and 20,000 and the polyester having an acid number of 10 to 200. The polyesters are suitable for …
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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 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 2009.
- 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.