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:
Feb. 18, 2025
Filed:
Dec. 12, 2023
Shoki Matsuda, Kanagawa, JP;
Keisuke Tada, Shizuoka, JP;
Yasuyuki Sanui, Shizuoka, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
Yellow toner with excellent cleanability, transferability and device contamination resistance is provided. When intensity of spectrum at wavenumber λ, at which total intensity of Raman spectrums of toner particles from 950 cmthrough 3,250 cmin Raman spectroscopy of toner is maximum, is normalized to 1, and distribution is generated for ≥300 particles regarding LC calculated by [LC (%)=CHrate (%)−CHrate (%)] based on CHrate (%) defined as [(I−I)/I]×100 and CHrate (%) defined as [(I−I)/I]×100 where Iand Irepresent integrated intensities of spectrums of center and surface portions of each particle from 2,750 cmthrough 3,250 cm, and Irepresents average of Iand Iof all particles, percentage by number of particles having LC deviating from LC distribution median by absolute value of ≥25.0; is ≥1.0% by number and ≤25.0% by number.