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:
Oct. 03, 1989
Filed:
Sep. 08, 1987
Applicant:
Inventors:
Assignees:
Societe Industrielle de Liaisons Electriques, Paris, FR;
Societe Anonyme de Telecommunications, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264173 ; 2642095 ; 2642356 ;
Abstract
A tube for protecting and guiding an optical fiber is constituted by two tubes which are co-extruded and then stretched. The inner tube thus acquires a reduced coefficient of linear expansion, which is closer to that of glass. The outer tube protects the inner tube from fibrils appearing on its surface.