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:
Jul. 16, 1991
Filed:
Feb. 13, 1989
Kenneth A Evans, Chalfont St. Peter, GB;
Kevin J Wills, Stoke Poges, GB;
Anthony R Emery, Chalfont St. Peter, GB;
Alcan International Limited, Montreal, CA;
Abstract
This invention relates to toothpaste containing an alumina hydrate abrasive and flavoring. According to the invention, there is provided a toothpaste containing flavoring and unmilled, precipitated alumina trihydrate as an abrasive, wherein the alumina trihydrate particles have a median particle size of at least 3 micrometers. The median particle size of the alumina trihydrate is preferably below 30 micrometers, more preferably from 5 to 20 micrometers, and most preferably 8 to 12 micrometers. It has been found that the use of an unmilled alumina trihydrate, obtained by precipitation, reduces the amount of flavoring material required to obtain a given flavor strength when compared with an equivalent content of milled alumina trihydrate of similar particle size.