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:
Feb. 20, 1990
Filed:
Jun. 20, 1988
Applicant:
Inventors:
Pietro Calzolari, Milan, IT;
Antonio Portinari, Sesto San Giovanni, IT;
Assignee:
Societa' Cavi Pirelli S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G12B / ;
U.S. Cl.
CPC ...
350 9623 ;
Abstract
An optical fiber cable with an elongated core of transparent plastic material having a plurality of readily visible tubes of a dull material embedded therein and extending longitudinally thereof. Each tube loosely receives at least one optical fiber. The core has a plurality of grooves at the outer surface thereof which extend parallel to the paths of the tubes and which are spaced from the tubes, and the grooves have a hydrogen retaining material therein. Each groove is on a radial line intermediate pairs of tubes.