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:
Mar. 20, 1979
Filed:
Sep. 19, 1977
Applicant:
Inventors:
Jos Koenings, Eys, DE;
Dieter Kuppers, Aachen, DE;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427 39 ; 65 / ; 65 13 ; 65 6 / ; 65DI / ; 427167 ;
Abstract
The change in the refractive index across the radius which is important for self-focussing fibre optic light conductors is obtained because in the plasma-activated CVD-method the oxygen content of the gas mixture and/or the temperature of the tube wall is continuously reduced during the coating procedure.
Koenings, Jos. (1979). Method of producing internally coated glass tubes for the drawing of (U.S. Patent No. 4145458). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4145458
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile