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:
Nov. 09, 2010
Filed:
Mar. 12, 2007
Hitoshi Kihara, Tsuchiura, JP;
Takashi Kambe, Tsuchiura, JP;
Shigeru Hayashida, Kofu, JP;
Taiyo Nippon Sanso Corporation, Tokyo, JP;
Abstract
A method for concentrating effectively the heavy nitrogen isotopeN to 50 atom % or more in whichNN and/orN, which are molecules containing a heavy nitrogen isotope ofN, are concentrated by distilling successively nitrogen Nusing plural distillation columns Tto Teach of which includes at least one condenser Cto Cand at least one reboiler Rto Rand is arranged in series, and a part of nitrogen in the distillation is drawn out to be subjected to isotope scrambling in an isotope scrambler S, and nitrogen after the isotope scrambling is returned to the distillation to produce nitrogen Nwith aN concentration of 50 atom % or more.