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:
Jan. 05, 1988
Filed:
Sep. 03, 1985
Applicant:
Inventors:
Fred W Hill, Thousand Oaks, CA (US);
Michael R Vince, Thousand Oaks, CA (US);
Assignee:
Hughes Aircraft Company, Los Angeles, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10B / ;
U.S. Cl.
CPC ...
156624 ; 1566 / ; 156D / ; 156D / ; 156D / ; 156D / ; 422241 ;
Abstract
Disclosed is a method for making large, essentially crack-free crystals in a container coated with inert particulate silica. The particulate coating covers the interior wall of the container and prevents adhesion of the crystal to the wall and acts like a cushion to avoid cracking of the crystal or the container. It also serves as a barrier to prevent migration of impurities from the container wall into the crystal structure. The coating is formed by heating a silica-forming gaseous mixture flowing through the container, with components of this mixture either reacting to form the coating.