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:
Mar. 20, 1990
Filed:
Aug. 18, 1988
Applicant:
Inventors:
Assignee:
G-C Dental Industrial Corp., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61C / ; B28B / ; C04B / ;
U.S. Cl.
CPC ...
106 3835 ; 106 35 ; 106383 ; 106109 ; 106110 ; 106111 ; 164D / ; 4331991 ; 433213 ; 433214 ;
Abstract
A dental investement composition in the low-dusting powdery form contains (a) a mixture of a soluble phosphate with magnesium oxide or hemihydrate gypsum as a binder, (b) quartz and/or christobalite as a refractory material, (c) one or more wetting agents selected from the group consisting of hydrophobic liquid hydrocarbons, liquid hydrophobic fatty acid esters and liquid hydrophobic fatty acids showing a vapor pressure of 3.15 mmHg or below 20.degree. C., and (d) one or more anionic surface active agents selected from the group consisting of alkylbenzene sulfonates and alkyl sulfates.