Electricity: conductors and insulators – Anti-inductive structures – Conductor transposition
Reexamination Certificate
2006-10-24
2006-10-24
Wu, David W. (Department: 1713)
Electricity: conductors and insulators
Anti-inductive structures
Conductor transposition
C525S011000, C525S192000, C525S200000, C526S242000, C526S254000
Reexamination Certificate
active
07126056
ABSTRACT:
The present invention relates to a partially-crystalline copolymer comprising tetrafluoroethylene, hexafluoropropylene in an amount corresponding to HFPI of from about 2.8 to 5.3, and preferably from about 0.2% to 3% by weight of perfluoro(alkyl vinyl ether), said copolymer being polymerized and isolated in the absence of added alkali metal salts, having a melt flow rate of within the range of about 30±3 g/10 min, and having no more than about 50 unstable endgroups/106carbon atoms can be extruded at high speed onto conductor over a broad polymer melt temperature range to give insulated wire of high quality.
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George Odian, Principles of Polymerization, (1991), p. 241, Third Edition, John Wiley & Sons, Inc., New York.
Earnest, Jr. Thomas Robert
Favereau Daniel A.
McKee Niall D.
Tooley Patricia A.
E. I. du Pont de Nemours and Company
Hu Henry S.
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