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:
May. 19, 1998
Filed:
Jul. 25, 1997
Tiang Shing Chang, Westfield, NJ (US);
Donna Diferdinando, Union Beach, NJ (US);
Other;
Abstract
An improved denture fixative composition comprising an adhesion promoter and a highly cross-linked copolymer of a lower alkyl vinyl ether and maleic anhydride or acid is disclosed wherein at least 65.0% of the total number of initial carboxyl groups in the copolymer are reacted. The cross-linking agent employed in this invention is calcium cation and optionally up to about 30.0% of the calcium function can be replaced with other inorganic cross-linking agents or polyhydroxy compounds either singly or in combination. The adhesion promoters are chelating agents such as polycarboxylic acids, hydroxycarboxylic acids, aminocarboxylic acids, polyphosphoric acids and their alkali salts.