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:
Oct. 12, 2010
Filed:
Sep. 18, 2009
Yoshihiro Ogawa, Yokohama, JP;
Yusuke Hasegawa, Suntou-gun, JP;
Kouji Nishikawa, Susono, JP;
Miho Okazaki, Suntou-gun, JP;
Yoshitaka Suzumura, Mishima, JP;
Takashige Kasuya, Suntou-gun, JP;
Yoshihiro Ogawa, Yokohama, JP;
Yusuke Hasegawa, Suntou-gun, JP;
Kouji Nishikawa, Susono, JP;
Miho Okazaki, Suntou-gun, JP;
Yoshitaka Suzumura, Mishima, JP;
Takashige Kasuya, Suntou-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Hydrophobic inorganic fine particles are provided which: does not cause melt adhesion of toner to a photosensitive member and contamination of a contact charging member; imparts excellent flowability, charging performance and durability to toner even after the toner is stored in a high-temperature, high-humidity environment over a long time period; and does not cause dripping of toner and contamination with the toner. The hydrophobic inorganic fine particles are obtained by subjecting inorganic fine particles to surface treatment with silicone oil and then with a silane compound and/or a silazane compound, or by subjecting inorganic fine particles to surface treatment with a silane compound and/or a silazane compound in the presence of silicone oil, and further subjecting the inorganic fine particles thus surface-treated to surface treatment with silicone oil.