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:
Mar. 28, 1989
Filed:
Aug. 31, 1987
Applicant:
Inventors:
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313496 ; 313634 ; 220 / ;
Abstract
A flat fluorescent display panel, having in parallel an anode plate and a cover plate separated by a frame-type spacer whose central open area defines an inner space for a fluorescent material and electrode structure. The three layers are joined and sealed together such that the inner space may be evacuated. The cover is cut or slit, forming an opening that expose the inner space and permits evacuation. The opening is closed and sealed by a portion of the cover or some suitable sealing structure.