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US Patent 11249408 Toner

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Contents

Is a
Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
11249408
Date of Patent
February 15, 2022
Patent Application Number
16911929
Date Filed
June 25, 2020
Patent Citations
‌
US Patent 10054866 Toner
‌
US Patent 10114303 Toner
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US Patent 10156800 Toner, developing device, and image forming apparatus
‌
US Patent 10197934 Toner, developing apparatus, and image-forming apparatus provided with toner
‌
US Patent 10303074 Toner
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US Patent 10429757 Toner
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US Patent 10503090 Toner
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US Patent 10545422 Toner
...
Patent Citations Received
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US Patent 11573519 Electrophotographic apparatus and process cartridge
Patent Primary Examiner
‌
Mark A Chapman
Patent abstract

A toner including a toner particle including a binder resin, wherein fine particles A and B are present on a surface of the toner particle; the fine particles A are a fatty acid metal salt; the fine particles B have a specific volume resistivity; an average theoretical surface area of the toner particle, an amount of the fine particles A, and a coverage ratio of the toner particle surface by the fine particles A satisfy a specific relationship; the amount of the fine particles B is in a specific range; and a proportion F of an area occupied by a part of the fine particles B embedded in a surface vicinity region of the toner in a total area occupied by the fine particles B present in a cross section of one particle of the toner is 50% by area or more.

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