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:
Oct. 13, 1998
Filed:
Jul. 23, 1997
Applicant:
Inventors:
Fuminobu Kubo, Katano, JP;
Kazuhiko Johshin, Yokosuka, JP;
Assignee:
Taisei Dental Mfg. Co., Ltd., , JP;
Primary Examiner:
Int. Cl.
CPC ...
B22C / ; H61K / ;
U.S. Cl.
CPC ...
106 35 ; 106 382 ; 106 383 ; 106 389 ; 106692 ; 106802 ; 501-4 ;
Abstract
A dental investing material is disclosed which comprises a combination of: (a) quartz and/or cristobalite, (b) a phosphate binder, and (c) aluminous cement, wherein said dental investing material is further added with tridymite and magnesium silicate. The disclosed dental investing material shows minimized expansion during hardening, significant expansion during heating and develops no cracks when heated at a conventional heating rate.