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:
Mar. 31, 2020
Filed:
Dec. 27, 2013
Lexmark International, Inc., Lexington, KY (US);
Kasturi Rangan Srinivasan, Longmont, CO (US);
Rick Owen Jones, Berthoud, CO (US);
Courtney Harrison Soale, Lexington, KY (US);
Devon Jean Vaccaro Strain, Shelbyville, KY (US);
Ligia Aura Bejat, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
The toner composition of the present invention and method to make the same includes toner particles mixed with a specific set of extra particulate additives including large colloidal silica sized 90 nm to 120 nm and having a conductivity of less than 20 μs/cm in combination with medium size silica particles sized 30 nm to 60 nm. Optionally, additional extra particular additives such as silica sized 2 nm to 20 nm, alumina, titania or mixtures thereof can be used. The finished toner having these specific additives exhibited superior printing performance.