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. 08, 1992
Applicant:
Inventors:
Assignees:
Nippon Carbon Co., Ltd., Tokyo, JP;
Shinwa Chemical Industries, Ltd., KuKyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; B01J / ; B01J / ; G01N / ;
U.S. Cl.
CPC ...
502429 ; 264 295 ; 502416 ; 502428 ; 502432 ; 502437 ; 95 88 ;
Abstract
An adsorption type packing for gas chromatography composed of finely divided carbon particles in whole, and having a ratio of nitrogen gas adsorption at a relative pressure of 0.3 (V.sub.0.3) to nitrogen gas adsorption at a relative pressure of about 1.0 (V.sub.1.0) each in the adsorption isotherm of said packing, V.sub.0.3 /V.sub.1.0, of 0.9 or more and a BET specific surface area of 1,000 to 2,000 m.sup.2 /g; and a process for producing said packing.