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:
Jul. 28, 2020
Filed:
Dec. 07, 2018
Applicants:
Takahiko Kuroda, Hyogo, JP;
Satoshi Mizukami, Kanagawa, JP;
Inventors:
Takahiko Kuroda, Hyogo, JP;
Satoshi Mizukami, Kanagawa, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/14 (2006.01); B41J 2/16 (2006.01);
U.S. Cl.
CPC ...
B41J 2/1433 (2013.01); B41J 2/161 (2013.01); B41J 2/162 (2013.01); B41J 2/1606 (2013.01); B41J 2/1623 (2013.01); B41J 2/1642 (2013.01);
Abstract
A liquid discharge head includes a head substrate and a surface treatment film on a surface of the head substrate. The surface treatment film is an oxide film containing Si. The oxide film contains a transition metal to form a passive film. A content of Si in a vicinity of an interface of the surface treatment film with the head substrate is higher than a content of Si in an inside of the surface treatment film and is 20 at % or more.