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. 17, 1981
Filed:
Oct. 13, 1978
Applicant:
Inventors:
Francis V Utsch, Chester, VA (US);
Roger Z de la Burde, Powhatan, VA (US);
Patrick E Aument, Hopewell, VA (US);
Assignee:
Philip Morris Incorporated, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
A24B / ;
U.S. Cl.
CPC ...
1311 / ;
Abstract
A process for impregnating tobacco with carbon dioxide is provided. The process comprises: (a) contacting tobacco with carbon dioxide gas at relatively low pressure (b) rapidly cooling the tobacco-carbon dioxide system until the carbon dioxide condenses as liquid or solid within the tobacco and finally solidifies, and (c) releasing the pressure in the cooled system. Thereafter, the carbon dioxide-treated tobacco may be expanded conventionally, such as by subjecting it to heating conditions effective to liberate the carbon dioxide therein.