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:
Feb. 06, 1990
Filed:
Jul. 11, 1987
Applicant:
Inventors:
Wayne K Rice, Wanatah, IN (US);
Laxman Singh, South Holland, IL (US);
Assignee:
Vitamins, Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210634 ; 210787 ; 2101951 ; 2604124 ; 422261 ; 422281 ;
Abstract
Soluble materials are continuously extracted from solids using extracting solvents such as carbon dioxide by circulating a mixture of the solids in carbon dioxide at elevated pressure through a closed loop pipeline. A mixture of extracts dissolved in carbon dioxide is continuously removed from the system and material to be extracted is continually added. Multiple extraction stages are also disclosed.