Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Reexamination Certificate
2005-02-08
2005-02-08
Sergent, Rabon (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
C252S182200, C252S182220, C528S063000, C528S064000, C528S065000, C528S076000, C560S025000, C560S026000, C560S115000, C560S158000, C560S330000, C560S336000
Reexamination Certificate
active
06852823
ABSTRACT:
Polyurethanes or polyurethane-ureas prepared from: (a) polytrimethylene ether glycol having a number average molecular weight in the range of about 1,000 to about 4,000 and unsaturated end groups in the range of about 0.003 to about 0.015 meq/g; (b) diisocyanate; and (c) diol or diamine chain extender; and their manufacture, intermediates and use.
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McInnis Edwin L.
Sunkara Hari B.
E. I. du Pont de Nemours and Company
Kuller Mark D.
Sergent Rabon
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