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:
Nov. 05, 1996
Filed:
Apr. 19, 1995
Applicant:
Inventors:
Yasuko Maruo, Kodaira, JP;
Shigekuni Sasaki, Iruma, JP;
Toshiaki Tamamura, Atsugi, JP;
Tohru Matsuura, Yokohama, JP;
Shinji Ando, Tokyo, JP;
Shinsuke Matsui, Kodaira, JP;
Fumio Yamamoto, Hoya, JP;
Assignee:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385143 ; 385131 ; 385132 ; 385145 ;
Abstract
A polyimide optical waveguide comprising a core made of polyimide whose refractive index is controlled to a predetermined value by electron beam irradiation, and a cladding set in contact with the core and having a refractive index lower than that of the core.