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:
May. 29, 1990
Filed:
Jun. 13, 1989
Applicant:
Inventor:
Perry B Lassiter, Johnson City, TN (US);
Assignee:
Premier Refractories & Chemicals Inc., King of Prussia, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501133 ; 501154 ;
Abstract
A method of producing a cast fused silica product includes grinding fused silica particles to have a first particle size and to form an aqueous slurry. A fused silica aggregate is provided having a second particle size greater than the first particle size. A first amount of the aqueous slurry is dried to form dried fused silica particles and the dry fused silica particles are ground to have a third particle size intermediate to the first and second particles sizes. A second amount of the aqueous slurry, the fused silica aggregate and the ground fused silica particles are admixed to form a casting mix.