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:
Sep. 14, 1999
Filed:
Oct. 16, 1997
Applicant:
Inventors:
Rene Bertocchio, Vourles Par Vernaison, FR;
Andre Lantz, Vernaison, FR;
Daniel Roland, Lyons, FR;
Bertrand Collier, Saint Genis Laval, FR;
Assignee:
Elf Atochem S.A., , FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; B01D / ; B01D / ; B01D / ;
U.S. Cl.
CPC ...
20415715 ; 2051573 ; 20515721 ; 210748 ; 210915 ;
Abstract
To remove the olefinic impurities from a hydrochlorofluoroethane of formula: CF.sub.3 --CHClX (X=H, F, or Cl), it is subjected to a photochlorination stage.