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. 05, 2019
Filed:
Jun. 04, 2014
Applicant:
Air Products and Chemicals, Inc., Allentown, PA (US);
Inventors:
Guohua Xiu, Shanghai, CN;
Peng Zhang, Shanghai, CN;
Assignee:
VERSUM MATERIALS US, LLC, Tempe, AZ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F25J 1/00 (2006.01); C01B 21/22 (2006.01);
U.S. Cl.
CPC ...
C01B 21/22 (2013.01); Y02C 20/10 (2013.01);
Abstract
This invention is aimed at recovering and purifying nitrous oxide from the gas stream containing NO to produce different grade of nitrous oxide by combination of unit operation including, but not limited to, wet scrubbing, adsorption, liquefaction, flash distillation or continuous distillation with reflux.