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:
Jul. 03, 1990
Filed:
May. 11, 1989
Applicant:
Inventors:
Manfred Gehrig, Wolnzach, DE;
Adrian Forster, Wolnzach, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A23F / ;
U.S. Cl.
CPC ...
426386 ; 426597 ; 426427 ;
Abstract
By the extraction with CO.sub.2 at 60 to 150 bar and 20.degree. to 70.degree. C., an aroma enriched fraction is taken from the moistened black tea, said fraction being added again to already decaffeinated and dried tea. Decaffeination starts after the aroma fraction has been obtained by pumping carbon dioxide at a pressure of between 150 to 500 bar and a temperature of between 10.degree. to 100.degree. C. through a bulk moistened tea. The solvent charged with caffeine is passed over an adsorber or purified by reduction of density.