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:
May. 02, 1978
Filed:
Apr. 04, 1977
Applicant:
Inventors:
John Irven, Harlow, EN;
Andrew Peter Harrison, Stansted, EN;
Assignee:
International Standard Electric Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C03C / ; C03B / ;
U.S. Cl.
CPC ...
65-2 ; 65 / ; 65 13 ; 65 29 ; 65DI / ;
Abstract
A method is described of increasing the proportion of chemical vapor reaction deposited material to substrate material in a silica optical fiber preform. The deposited material is deposited upon the bore of a silica substrate tube whose bore is then collapsed to form the preform. The preform is then heated to cause some of the surface of the preform to be driven off by volatilization in order to increase the proportion of chemical vapor reaction deposited material to substrate material up to a predetermined value.