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:
Sep. 04, 1990
Filed:
Aug. 31, 1987
Applicant:
Inventors:
Masao Yafuso, El Toro, CA (US);
Cheng F Yan, Irvine, CA (US);
Thomas G Hacker, Anaheim, CA (US);
Henry K Hui, Irvine, CA (US);
Thomas P Maxwell, Santa Ana, CA (US);
William W Miller, Santa Ana, CA (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
422 59 ; 422 56 ; 422 57 ; 422 68 ; 422 87 ; 422 8208 ; 422 8209 ; 436 68 ; 436167 ; 436172 ; 128634 ; 350 9629 ; 356 39 ; 25022711 ;
Abstract
An apparatus for measuring the concentration of a component in a medium comprising: an optical sensor including at least one optical indicator for providing an optical signal which varies in response to the presence of a component in a medium; an optical signal fiber capable of transmitting the optical signal from the optical sensor; and a supply reservoir associated with the optical sensor and acting to provide additional optical indicator to the optical sensor.