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:
Aug. 17, 1993
Filed:
Jun. 25, 1991
Applicant:
Inventors:
Jules B Puschett, New Orleans, LA (US);
Krzysztof Matyjaszewski, Pittsburgh, PA (US);
Bhalchandra Karandikar, Pittsburgh, PA (US);
Assignee:
University of Pittsburgh, Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
422 8211 ; 422 8206 ; 427163 ; 427164 ; 427-2 ; 436163 ;
Abstract
A method of chemically modifying the poly (methyl methacrylate) (hereinafter 'PMMA') clad surface of an optical fiber to introduce amino groups. N-butyl lithium in a suitable organic solvent with ethylene diamine is applied to the clad surface of the optical fiber in a substantially oxygen-free atmosphere, such as nitrogen, at approximately 10.degree. C. to 40.degree. C. for about one to two hours. A pH-sensitive dye with isothiocyanate functionality can be bounded to the modified clad surface resulting in a pH sensor based on fiber optics.