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:
Nov. 25, 1980
Filed:
Aug. 24, 1978
Joseph Aliotta, Newton, MA (US);
Louis F Alcuri, Jr, Matawan, NJ (US);
Engelhard Minerals & Chemicals Corporation, Iselin, NJ (US);
Abstract
A corrosion-resistant dental alloy shows improved handling characteristics during the filling of a dental cavity with an amalgam of the alloy. The alloy particles comprise a mixture of silver, tin and copper particles having a mean particle size of between about 20 and 26.5 microns, and further having a particle size distribution such that substantially all of the particles fall within a particle size range of from about 10 to 52 microns. The particles have a surface area ranging between about 0.22 m.sup.2 /gm and 0.31 m.sup.2 /gm. The alloy, after amalgamation with mercury, retains a corrosion resistance comparable to that of spherical particles having substantially the same composition and having a surface area of about 0.21 m.sup.2 /gm, while retaining handling characteristics comparable to those of flake-like particles also having substantially the same composition and having a surface area of at least about 0.33 m.sup.2 /gm. The copper and silver content of the particles may be higher at their surface than in the interior thereof.