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. 17, 1992
Filed:
Oct. 10, 1991
Applicant:
Inventors:
John H Ziemer, Grand Island, NY (US);
Ravindra F Pahade, Getzville, NY (US);
Assignee:
Praxair Technology, Inc., Danbury, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J / ;
U.S. Cl.
CPC ...
62 24 ; 62 28 ; 62 39 ;
Abstract
A cryogenic rectification system wherein nitrogen top vapor of a higher pressure column reboils the column to provide additional vapor upflow and liquid downflow reflux for increased column drive and improved oxygen recovery.