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. 01, 1987
Filed:
Jul. 28, 1986
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313486 ; 313489 ;
Abstract
A fluorescent lamp is disclosed which has a glass bulb with a coating layer of phosphor particles on the inner surface, the phosphor particles being covered by a protective layer consisting of a metal oxide. The phosphor particles are not in direct contact with the glass bulb by virture of the protective layer. Thus, it is possible to prevent the reduction of the mechanical strength of the bulb and reduction of the luminuous efficiency of phosphor due to interaction between the glass bulb and phosphor particles.