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. 11, 2001
Filed:
Apr. 11, 2000
Applicant:
Inventors:
Hiroki Kawada, Ishioka, JP;
Tomoji Watanabe, Tsuchiura, JP;
Nobuo Tsumaki, Ushiku, JP;
Toshimitsu Miyata, Toyama-ken, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A21B 1/00 ;
U.S. Cl.
CPC ...
A21B 1/00 ;
Abstract
A vacuum heating furnace comprises a translucent container for retaining a heated object and a heating light source for heating a heated object retained in the translucent container. The translucent container has on its surface a tapered portion to receive transmitted light totally reflected on the inner surface of the translucent container at an angle smaller than a critical angle.