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. 11, 1979
Filed:
Apr. 26, 1977
Applicant:
Inventors:
Otto Vitzthum, Bremen, DE;
Peter Hubert, Bremen-Lesum, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A23F / ;
U.S. Cl.
CPC ...
426312 ; 426318 ; 426319 ; 426386 ; 426427 ; 426428 ; 426424 ; 426478 ;
Abstract
A caffeine free black tea product is produced by an extraction procedure with a supercritical gas such as carbon dioxide in which first the aromatic content of the tea is extracted with dry gas, then the caffeine content is extracted with wet gas, and finally the decaffeinated tea is reimpregnated with the aromatic content.
Vitzthum, Otto. (1979). Method for the manufacture of caffeine free black tea (U.S. Patent No. 4167589). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4167589
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile