Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2005-08-04
2008-05-20
Boykin, Terressa M. (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C264S176100, C264S219000, C359S107000, C359S642000, C428S034100, C528S196000, C528S198000
Reexamination Certificate
active
07375166
ABSTRACT:
A method for manufacturing a film or sheet comprises deforming a polymeric alloy at a temperature effective to impart to the deformed alloy a birefringence retardation of greater than or equal to about 750 nanometers. A method eliminating comets and veins in an optical film or sheet comprises annealing the film or sheet to a temperature greater than the lowest glass transition temperature of the polymeric resins contained in the alloy. A composition comprises a first polymeric resin in an amount of about 1 to about 99 wt %; and a second polymeric resin in an amount of about 1 to about 99 wt %, wherein the polymeric resins are blended with a deforming force effective to produce a polymeric alloy having a birefringence retardation of greater than or equal to about 750 nanometers.
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International Search Report for PCT/US2004/013438 Internaitonal Filing Date Apr. 30, 2004.
Agarwal Parminder
Chakravarti Shreyas
Tadros Safwat
Vollenberg Peter
Boykin Terressa M.
Cantor & Colburn LLP
General Electric Company
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