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:
Dec. 24, 2024
Filed:
Nov. 27, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Masanori Yokoyama, Shizuoka, JP;
Kenya Terada, Shizuoka, JP;
Takehiko Aoyama, Shizuoka, JP;
Shota Segawa, Shizuoka, JP;
Hisao Kato, Kanagawa, JP;
Mitsuhiro Kunieda, Kanagawa, JP;
Arihiro Yamamoto, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a cleaning member, comprising an elastic member that includes polyurethane, wherein: when tan δ of a test piece sampled from the elastic member is measured in the temperature range of −20° C. to +60° C., the peak temperature of a peak indicating the maximum value of tan δ is at 15.0° C. or below; the maximum value of tan δ is 0.20 to 0.55; tan δ at a temperature of 55° C. is 0.13 or larger; and where the detected quantity of all ions obtained when the test piece is heated at a rate of temperature increase of 10° C./second to 1000° C. using a direct-sampling mass spectrometer is Mand the integrated intensity of a peak in a derived ion thermogram that corresponds to a range of m/z values originating in multifunctional isocyanate with at least three isocyanate groups is M, M/Mis at least 0.001.