Aromatic polyesters, polyesteramides, and compositions thereof
CA 1296473 C · Owner: Kumazawa, Yumiko · Inventors: Kumazawa, Yumiko; Yoshino, Kenji; Komatsu, Masafumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aromatic polyester consisting of 40-70 mol % of a first unit derived from p-hydroxybenzoic acid 1-8 mol % of a second, unit derived from m-hydroxybenzoic acid or isophthalic acid 6-, 36 mol % of third and fourth units derived from terephthalic acid and 2,6-naphthalene dicarboxylic acid respectively, and, 10-40 mol % of a fifth unit derived from a symmetrical dihydroxy compound can be melt molded at a temperature of up to 330°C into an article having improved mechanical and thermal properties. An aromatic polyesteramide consisting of the first to fifth units and a sixth unit having an anilino group is also provided. A filled composition is obtained by blending the polyester or …
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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 February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 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
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.