Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Reexamination Certificate
2011-06-28
2011-06-28
Johnson, Christina (Department: 1742)
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
C264S184000, C264S17800F, C264S211160, C264S211200, C528S423000
Reexamination Certificate
active
07968029
ABSTRACT:
The present invention relates to processes for hydrolyzing polyphosphoric acid in polyareneazole filaments.
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E. I. Du Pont de Nemours and Company
Johnson Christina
Magellan Systems International, LLC
Schiffman Benjamin
Woodcock & Washburn LLP
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