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. 13, 2024
Filed:
Jan. 19, 2021
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Isao Imamura, Kanagawa, JP;
Sachiko Yamauchi, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B03C 3/28 (2006.01); B03C 3/64 (2006.01);
U.S. Cl.
CPC ...
B03C 3/28 (2013.01); B03C 3/64 (2013.01);
Abstract
A unit for electrostatic filter includes: a repeated structure of patterns that are respectively formed of one selected from at least two different substances having different work functions. The patterns formed of the different substances are put in contact with each other. The work functions differ by 1 eV or greater between the different substances put in contact with each other in the patterns.