Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Reexamination Certificate
2007-01-09
2007-01-09
Boykin, Terressa (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
C528S220000, C528S480000, C528S481000, C528S494000
Reexamination Certificate
active
10478997
ABSTRACT:
Method of purifying a polymeric material of a type which includes (A) phenyl moieties; (B) carbonyl and/or sulphone moieties; and; (C) ether and/or thioether moieties. The method includes contacting the polymeric material with a solvent formulation which is at a temperature of greater than 100° C. and a pressure above ambient pressure thereby to charge the solvent formulation with impurities derived from the polymeric material, and separating the charged solvent from the polymeric material.
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Colquhoun, Howard M., et al; “Synthesis of Aromatic Polyetherketones in Trifluoromethanesulphonic Acid”;Polymer, vol. 29, No. 10, pp. 1902-1908, (1988), XP000986259.
Devine John Neil
Green Stuart
Kemmish David John
Wilson Brian
Boykin Terressa
Nixon & Vanderhye
Victrex Manufacturing Limited
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