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. 29, 2022
Filed:
Aug. 28, 2018
Applicant:
Evonik Operations Gmbh, Essen, DE;
Inventors:
William J. Hagar, Perryville, MD (US);
Terry W. Nassivera, Gambrills, MD (US);
Karl W. Gallis, Perryville, MD (US);
Assignee:
Evonik Operations GmbH, Essen, DE;
Primary Examiner:
Int. Cl.
CPC ...
A61K 8/25 (2006.01); A61K 8/02 (2006.01);
U.S. Cl.
CPC ...
A61K 8/25 (2013.01); A61K 8/025 (2013.01);
Abstract
Silica particles having a d50 median particle size of at least 6 μm, a ratio of (d90−d10)/d50 from 1.1 to 2.4, a RDA at 20 wt. % loading from 40 to 200, and a sphericity factor (S80) of at least 0.9, are disclosed, as well as methods for making these silica particles, and dentifrice compositions containing the silica particles.