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:
Oct. 31, 1989
Filed:
Aug. 20, 1987
Applicant:
Inventors:
Shohei Oda, Saitama, JP;
Osamu Seshimoto, Saitama, JP;
Tohru Sueyoshi, Saitama, JP;
Hiroyuki Amano, Saitama, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
422 68 ; 435291 ; 436806 ;
Abstract
A chemical sensor having a field-effect transistor as an electronic transducer and used for the analysis of specific constituents in a liquid, the chemical sensor comprising means which permits an externally supplied sample solution to reach a chemical receptor of said chemical sensor but substantially prevents external light from reaching said field effect transistor.