Electric cables of reduced micro-voids in the extruded insulation

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4360706
SERIAL NO

06139829

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A product by process for reducing micro-voids in cross-linked cable insulation without reducing the voltage breakdown strength thereof in which process the insulation, after cross-linking, is heated at a temperature in the range from about 120.degree. C. to about 150.degree. C. and under a pressure less than 10 mm. Hg for a period from about 8 hours to 48 hours. Also, a cable having such insulation which has micro-voids less than about 10.sup.2 per mm.sup.3 and a perforation gradient greater than the perforation gradient of a cable which has not been so treated.

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Patent Owner(s)

Patent OwnerAddress
SOCIETA' PIRELLI S P A A COMPANY OF ITALYPIAZZALE CADORNA 5 20123 MILAN

International Classification(s)

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  • 1980 Application Filing Year
  • H01B Class
  • 213 Applications Filed
  • 2 Patents Issued To-Date
  • 0.94 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances19801981198219831984198519861987198819891990199119921993199419951996199719981999200020010255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lanfranconi, Gianmario Trezzo d'Adda, IT 12 222
Vecellio, Bernardino Milan, IT 8 34

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  • 8 Citation Count
  • H01B Class
  • 0 % this patent is cited more than
  • 43 Age
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