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. 25, 1989
Filed:
Feb. 16, 1988
Hans von Weissenfluh, Magadino, CH;
Hawe-Neos Dental Dr. H. Von Weissenfluh S.A., Gentilino, CH;
Abstract
The matrix consisting of a thin flexible strip of plastic comprises a loop 1 to be placed around the tooth to give the desired shape to the filling material. It is permanently connected to an annular tightener (2) made of material permanently deformable by pressure with the fingers and dentist's forceps, for example, of annealed aluminum sheet. It exhibits, in the front, a slit (3) through which pass the two terminal extensions (1',1') of flexible strip (1) and, in the back, tabs (2',2') between which are permanently fastened the ends of said terminal extensions (1, 1') of said strip, so that by compressing said annular tightener (arrows 4, 5) it determines the slipping of slit (3) like a slider on the extensions (1', 11') of the strip, the narrowing of loop (1) and the perfect adherence of the loop of the strip to the tooth.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile