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. 27, 1977
Filed:
May. 27, 1975
Applicant:
Inventor:
Carl F Swinehart, University Heights, OH (US);
Assignee:
The Harshaw Chemical Company, Cleveland, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ; B01J / ; B01J / ; C01D / ;
U.S. Cl.
CPC ...
23301 ; 23304 ; 2330 / ; 156605 ; 1566 / ; 2523 / ;
Abstract
Large, doped crystal ingots are grown in a Stockbarger furnace from a melt of an alkali metal or alkaline earth metal salt using very slow oscillation (1 - 2 cycles per minute) of the ingot through a small arc of 5.degree. -20.degree. to produce an ingot having a more even distribution of dopant and an absence of open boundaries between macrocrystals within the ingot.