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:
Jun. 20, 1978
Filed:
Jun. 23, 1975
Applicant:
Inventors:
Jarda L Caslavsky, Lexington, MA (US);
Frederick Schmid, Marblehead, MA (US);
Charles P Gazzara, Reading, MA (US);
Dennis J Viechnicki, Wellesley, MA (US);
James W McCauley, Wakefield, MA (US);
Assignee:
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; C01F / ;
U.S. Cl.
CPC ...
1566 / ; 156D / ; 156D / ; 2330 / ; 106 42 ; 106 65 ; 106 734 ; 423625 ;
Abstract
A method for the production of improved, transparent single crystals having a corundum structure under conditions of minimum thermal strain, comprising the optimum orientation of growth planes of a seed crystal in a melt substantially parallel to the vertical side wall means of a crucible, and heating and subsequent cooling the melt, thereby nucleating on the seed crystal.