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:
Feb. 04, 1997
Filed:
Aug. 28, 1991
Applicant:
Inventor:
Dieter Drechsel, Bruchk obel, DE;
Assignee:
Leybold Aktiengesellschaft, Hanau, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C30B / ;
U.S. Cl.
CPC ...
117208 ;
Abstract
A lock valve disposed between a pulling pot and a lock chamber is opened at the start of the pulling process and thereby uncovers a lock entrance for the crystal that is to be pulled, and together with a gasket closes the lock entrance after the end of the pulling process and thereby hermetically separates the pulling pot from the lock chamber. The gasket (9) is protected during the pulling of the crystal by a guard (15, 16) against the thermal radiation of the hot crystal.
Drechsel, Dieter. (1997). Apparatus for crystal pulling (U.S. Patent No. 5599390). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5599390
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile