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:
Dec. 12, 2000
Filed:
Mar. 31, 1999
Jim Jenqtsong Sheu, Dunwoody, GA (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
An optical cable [100] having one or more optical fibers [11] that are surrounded by an improved filling material [10] is disclosed. The filling material includes one or more synthetic oil(s) that are present in an amount, which is 80 to 95 percent by weight of the filling material and which have an average molecular weight that is greater than about 350. The filling material further includes an organic gelling agent, which is a diblock copolymer that is present in an amount of about 5 to 20 percent by weight. However, no more than 1.5 percent by weight of inorganic gelling agents may be used without impairing the long-term stability of the viscosity and the yield stress of the filling material. Preferably, a blend of two different polyalphaolefin oils are used while inorganic gel ling agents are completely avoided. Critical-yield stress is kept appropriately low (i.e., less than 0.01 psi) by the use of diblock copolymers. Together, these factors cooperate to provide a filling material whose yield stress and viscosity have excellent stability over time.