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. 27, 1993
Filed:
Sep. 03, 1991
Applicant:
Inventors:
Leigh A Smith, Clemmons, NC (US);
James R Dodson, Walnut Cove, NC (US);
Assignee:
R. J. Reynolds Tobacco Company, Winston-Salem, NC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A24B / ;
U.S. Cl.
CPC ...
131297 ; 131298 ;
Abstract
Burley tobacco stems are extracted with tap water to provide a water soluble extract and a water insoluble pulp. The extract and water are separated from the pulp. The extract is provided within the water at a concentration at least about 30 percent, based on the weight of the extract and water. Then, the extract and water are heated to about 200.degree. F. The extract and water then is cooled to ambient temperature. Potassium nitrate crystals form as a precipitate and are separated from the extract and water.