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:
Jun. 08, 1982
Filed:
Apr. 24, 1980
Roger Z de la Burde, Powhatan, VA (US);
Patrick E Aument, Hopewell, VA (US);
Francis V Utsch, Chester, VA (US);
Philip Morris Incorporated, New York, NY (US);
Abstract
A novel tobacco product comprising tobacco containing gaseous carbon dioxide in an amount of at least 1 part of gaseous carbon dioxide per 100 parts of tobacco. The product, when rapidly heated is converted to expanded tobacco. An improved process for the expansion of tobacco is also provided which employs carbon dioxide as the expansion agent in a sequence of steps comprising: (1) contacting tobacco with carbon dioxide gas at a pressure of at least 250 psig for a time sufficient to impregnate the tobacco with the carbon dioxide gas, (2) releasing the pressure and (3) thereafter subjecting the carbon dioxide-treated tobacco to rapid heating conditions to remove the carbon dioxide and thereby expand the tobacco.