Optical waveguides – Optical transmission cable – Tightly confined
Reexamination Certificate
2006-12-26
2006-12-26
Connelly-Cushwa, Michelle (Department: 2874)
Optical waveguides
Optical transmission cable
Tightly confined
C385S100000
Reexamination Certificate
active
07155094
ABSTRACT:
A water-resistant telecommunication cable is disclosed comprising a solid and compact element surrounding at least one optical transmitting element, wherein the element is made from a vinyl alcohol/vinyl acetate copolymer having a hydrolysis degree of about 60% to about 95% and a polymerization degree higher than about 2,500; at least a first solid plasticizer having a melting point between 50° and 110° C., and a second solid plasticizer having a melting point equal or higher than 140° C., in an amount of about 10–30 and 1–10 parts by weight per hundred parts by weight of the copolymer, respectively; the water-soluble polymer material showing: a complex modulus (G*) equal to or higher than 2.5 106Mpa; a ratio of the viscous modulus to the elastic modulus (tan δ) equal to or lower than 2.30; and a glass transition temperature (Tg) of about 20° to about 35° C.
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Brandi Giovanni
Donetti Raffaella
Maritano Mauro
Pavan Massimiliano
Chu Chris
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Prysmian Cavi E Sistemi Energia S.R.L.
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