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:
May. 15, 1979
Filed:
Oct. 25, 1977
Applicant:
Inventors:
John A Favre, Bartlesville, OK (US);
Lloyd E Gardner, Bartlesville, OK (US);
Assignee:
Phillips Petroleum Company, Bartlesville, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
55 67 ; 55197 ; 55208 ; 210 / ; 2101 / ;
Abstract
An apparatus and method for separating and collecting chromatographic samples in which three separate chromatographic columns are cycled through an elution mode, an elevated temperature back-flush mode, and a cooling back-flush mode in continuous repetition so that at any one time one of the columns is in an elution mode, another of the columns is in elevated temperature back-flush mode, and the remaining column is in cooling back-flush mode.