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. 16, 1977
Filed:
Oct. 20, 1976
Applicant:
Inventor:
Anselm Wachtel, Pittsburgh, PA (US);
Assignee:
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ; G02B / ;
U.S. Cl.
CPC ...
313489 ; 252300 ; 313112 ;
Abstract
A low-pressure mercury discharge device utilizing a black light generating phosphor coating in conjunction with a black light transmitting filter pigment. The black light transmitting filter pigment effectively transmits black light radiation and filters visible light radiation. The filter comprises magnesium phosphate doped with cobalt and nickel having a formula Mg.sub.3.sub.-x.sub.-y Co.sub.x Ni.sub.y (PO.sub.4).sub.2, x + y is from 1 to 1.4, x/y is from .8 to 1.2.