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. 25, 2012
Filed:
Feb. 12, 2009
Katsuhiko Kemmochi, Camas, WA (US);
Robert Joseph Coolich, North Bonneville, WA (US);
Katsuhiko Kemmochi, Camas, WA (US);
Robert Joseph Coolich, North Bonneville, WA (US);
Heraeus Shin-Etsu America, Inc., Camas, WA (US);
Abstract
A method of making a silica crucible in a mold cavity of the type in which air is drawing through silica grain placed in the mold cavity. A pure silica grain layer is formed on top of a natural silica grain layer. At least a portion of the purse silica grain layer is fused while substantially no air is drawn through the silica grain. Any remaining pure silica grain and a least a portion of the natural silica grain layer is fused while drawing a substantially higher volume of air through the silica. At least a portion of the fused pure silica grain layer is then sublimated.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile