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:
May. 11, 1993
Filed:
Nov. 12, 1991
Applicant:
Inventors:
James A Devore, Monongahela, PA (US);
Gary F Meenan, Bethel Park, PA (US);
Hayward B Oblad, Ponca City, OK (US);
Assignee:
Consolidation Coal Company, Pittsburg, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356442 ; 250574 ;
Abstract
An optoelectric detector having transparent tubes separated by a thin opaque barrier with LEDs in one tube adjacent one side of the barrier and a photoconductor in the other tube adjacent to the opposite side of the barrier. The LEDs and photoconductor being in close proximity with the photoconductor with the photoconductor only receiving light emitted by the LEDs which is reflected from the solids in medium in which the detector is used.