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:
Apr. 01, 1997
Filed:
Jul. 22, 1994
Applicant:
Inventor:
Paul J Walsh, Salt Lake City, UT (US);
Assignee:
Herecules Incorporated, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C30B / ;
U.S. Cl.
CPC ...
117 14 ; 117200 ;
Abstract
A piece of crystal pulling furnace hardware, especially one selected from among crucible holder tops, crucible holder bottoms, heaters, heat shields, and pedestals, is provided as a three-dimensional carbon-carbon composite. The enhanced physical properties of such a material provide advantages in the diameter of the crystal being pulled, the use of larger charges of crystallizable material in the furnace, and an increased life for the hardware.