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:
Jul. 18, 1989
Filed:
Jan. 29, 1988
Applicant:
Inventors:
Masao Yafuso, El Toro, CA (US);
Cheng F Yan, Anaheim, CA (US);
Henry K Hui, Irvine, CA (US);
William W Miller, Santa Ana, CA (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
422 55 ; 422 56 ; 422 58 ; 422 68 ; 422 83 ; 422 86 ; 422 87 ; 422 91 ; 436136 ; 436138 ; 436167 ; 436169 ; 436172 ; 436178 ;
Abstract
An optical sensor which is a gas permeable silicone polymeric matrix having at least one optical indicator therein for providing an optical signal in response to excitation light. The optical indicator essentially comprises a mixture of non-polar derivatives of a polynuclear aromatic compound.