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:
Aug. 09, 1994
Filed:
Dec. 18, 1991
Applicant:
Inventors:
Stephen F Yates, Rolling Meadows, IL (US);
Daniel F Harnish, Orchard Park, NY (US);
Addison M Smith, Amherst, NY (US);
Assignee:
Allied-Signal Inc., Morris Township, Morris County, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07C / ;
U.S. Cl.
CPC ...
203 29 ; 203D / ; 203D / ; 204 / ; 20415811 ; 570177 ; 570178 ;
Abstract
2-Chloro-1,1-difluoroethylene (R-1122) is removed from 1,1,1,2-tetrafluoroethane (R-134a) by contacting the R-134a in the vapor phase with chlorine in the presence of ultraviolet light providing an exposure of at least about 2 watts-hour/kg.