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:
Dec. 21, 1993
Filed:
Apr. 27, 1993
Applicant:
Inventors:
Takashi Ogawa, Chiba, JP;
Toshiro Minami, Hadano, JP;
Assignee:
Toshiba Ceramics Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F17C / ;
U.S. Cl.
CPC ...
62 501 ; 62 85 ; 62475 ;
Abstract
A ceramic filter containing low humidity is applied to a process for filtering of liquid nitrogen without employing a vaporizing step. An apparatus is provided for carrying out the process and includes a filter device of a ceramic filter containing relatively low humidity and having specific pore diameters and pressure regulators on both sides of the filter.