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:
Sep. 01, 1992
Filed:
Jul. 02, 1991
Joseph M van der Zel, Zwaag, NL;
Elephant Edelmetaal B.V., Hoorn, NL;
Abstract
A method of making a substructure for a dental restoration which comprises a substructure of a dental metal and a fired on coating of a dental ceramics, which method comprises applying a powder-form mixture of a dental metal powder and a thermoplastic polymeric material having a melting point above 50.degree. C., in the shape of the dental restoration to be made, to a porous refractory model, by means of a heated instrument, heating the assembly so obtained to a temperature at which the thermoplastic polymeric material liquefies and is sucked from the coating into the model, followed by raising the temperature of the assembly to a temperature at which the thermoplastic polymeric material disappears, and raising the temperature further to a sintering temperature at which the dental metal powder is sintered into a solid metal mass. The substructure so formed can be provided with a fired on coating of dental ceramics.