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:
Jan. 27, 2004
Filed:
Feb. 22, 2000
Applicant:
Inventors:
Robert A. Norwood, West Chester, PA (US);
Louay Eldada, Lexington, MA (US);
Shing Yin, Basking Ridge, NJ (US);
Cathy Glass, Sewickley, PA (US);
Robert M. Blomquist, Whippany, NJ (US);
Assignee:
E.I. du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/10 ;
U.S. Cl.
CPC ...
G02B 6/10 ;
Abstract
An optical signal device which is temperature sensitive and has at least one waveguide layer and at least one material incorporated into the device having a coefficient of thermal expansion of from about 20 to 200 ppm/°K sufficient to impart tensile stress to the waveguide layers as the temperature of the optical signal device changes.