The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 04, 2011
Filed:
Dec. 19, 2002
Mauro Maritano, Monza, IT;
Raffaella Donetti, Ghemme, IT;
Antonio Campana, Milan, IT;
Massimiliano Pavan, Verdello, IT;
Raimondo Scordamaglia, Milan, IT;
Mauro Maritano, Monza, IT;
Raffaella Donetti, Ghemme, IT;
Antonio Campana, Milan, IT;
Massimiliano Pavan, Verdello, IT;
Raimondo Scordamaglia, Milan, IT;
Prysmian Cavi e Sistemi Energia S.R.L., Milan, IT;
Abstract
Telecommunication cable having an elongated element housing at least one transmitting element. The elongated element has a water-soluble polymeric composition of a vinyl alcohol/vinyl acetate copolymer having a saponification degree of about 60% to about 95%; a plasticizer; a hydrolysis stabilizer compound having a chelant group having two hydrogen atoms bonded to two respective heteroatoms selected from nitrogen, oxygen and sulfur. The two hydrogen atoms have a distance between each other of 4.2×10m to 5.8×10m. The stabilizer compound is present in an amount of at least 0.75 mmoles per 100 g of copolymer. The elongated element is in particular a buffer tube housing a plurality of optical fibers. The presence of the stabilizer reduces the increase of the hydrolysis degree of the copolymer upon aging, thus maintaining the desired water blocking properties of the copolymer.