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. 04, 2025
Filed:
Jun. 12, 2019
Applicant:
Evonik Operations Gmbh, Essen, DE;
Inventors:
Karl W. Gallis, Perryville, MD (US);
William J. Hagar, Perryville, MD (US);
Terry W. Nassivera, Gambrills, MD (US);
Lawrence Edward Dolan, Cincinnati, OH (US);
Sanjeev Midha, Mason, OH (US);
Eva Schneiderman, Mason, OH (US);
Assignee:
Evonik Operations GmbH, Essen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C01B 33/187 (2006.01);
U.S. Cl.
CPC ...
C01B 33/187 (2013.01); C01P 2004/32 (2013.01); C01P 2004/61 (2013.01); C01P 2006/10 (2013.01); C01P 2006/12 (2013.01); C01P 2006/14 (2013.01);
Abstract
Silica particles having a d50 median particle size from 8 to 20 μm, a sphericity factor (S) of at least 0.9, a BET surface area from 0.1 to 8 m/g, a total mercury intrusion pore volume from 0.35 to 0.8 cc/g, and a loss on ignition from 3 to 7 wt. %, are disclosed, as well as methods for making these silica particles, and dentifrice compositions containing the silica particles.