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:
Apr. 17, 2018
Filed:
Dec. 12, 2007
Afshin Falsafi, Woodbury, MN (US);
Joel D. Oxman, Minneapolis, MN (US);
Tiffany T. Ton, Woodbury, MN (US);
Joan V. Brennan, Sierra Madre, CA (US);
David K. Cinader, Jr., Walnut, CA (US);
Bhaskar V. Velamakanni, Woodbury, MN (US);
Sumita B. Mitra, West St. Paul, MN (US);
Afshin Falsafi, Woodbury, MN (US);
Joel D. Oxman, Minneapolis, MN (US);
Tiffany T. Ton, Woodbury, MN (US);
Joan V. Brennan, Sierra Madre, CA (US);
David K. Cinader, Jr., Walnut, CA (US);
Bhaskar V. Velamakanni, Woodbury, MN (US);
Sumita B. Mitra, West St. Paul, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Methods of using a dental composition having a photobleachable dye and an acidic component with a pKa of less than 4.5 are disclosed. The photobleachable dye is selected from the group consisting of aminoanthraquinone dyes, azo dyes, and combinations thereof. The aged color of the dental composition is substantially the same as the color of the dental composition immediately after hardening.