Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1989-09-25
1990-10-02
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528176, 528179, 528183, 528186, 528342, 528348, C08G 7532
Patent
active
049608584
ABSTRACT:
There are provided aromatic heterocyclic polymers having repeating units of the formula ##STR1## wherein X is --S--, --O-- or --NH--.
REFERENCES:
patent: 4108835 (1978-08-01), Arnold et al.
patent: 4131748 (1978-12-01), Arnold et al.
patent: 4533692 (1985-08-01), Wolfe et al.
patent: 4533693 (1985-08-01), Wolfe et al.
patent: 4900805 (1990-02-01), Arnold et al.
Arnold Fred E.
Burkett Jerry L.
Anderson Harold D.
Bricker Charles F.
Singer Donald J.
The United States of America as represented by the Secretary of
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