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:
Feb. 09, 1982
Filed:
Dec. 15, 1980
Applicant:
Inventors:
Thomas E Peters, Chelmsford, MA (US);
James R McColl, Concord, MA (US);
Assignee:
GTE Laboratories Incorporated, Waltham, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
313467 ; 2523 / ;
Abstract
A white bodied green-emitting phosphor having improved persistence and brightness comprises manganese activated zinc silicate incorporating arsenic and an alkali metal wherein the arsenic to zinc atom ratio ranges between about 0.00005 to about 0.001 and wherein the alkali metal is present in an amount of between about 0.5 to about 2.0 times the concentration of arsenic present in the phosphor.