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:
Apr. 10, 2001
Filed:
Apr. 15, 1999
Applicant:
Inventors:
Toshikazu Ohnishi, Sagamihara, JP;
Masanori Mitome, Tsukuba, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 9/02 ;
U.S. Cl.
CPC ...
H01J 9/02 ;
Abstract
A method for making an electron emission device, which includes a conductive film having an electron emitting section disposed between a pair of electrodes, includes a removal step for removing impurities in a organic substance, and a voltage-applying step for applying an voltage to the conductive film through the electrodes in an atmosphere containing the organic substance. The electron emission device is suitable for an electron beam source in an image forming apparatus.