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:
Aug. 18, 2015
Filed:
Dec. 21, 2010
David Rushforth, London, GB;
John Sampson, London, GB;
David Rushforth, London, GB;
John Sampson, London, GB;
BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED, London, GB;
Abstract
The present invention relates to the inclusion of additives in a filter element comprising a non-woven sheet material or paper as the filter material to increase the selective removal of semi-volatile compounds and to improve the taste characteristics of the smoke drawn through the filter element. The increased selective removal of semi-volatile compounds from the smoke being drawn through the filter element is provided by polyethylene glycol. TEC and/or triacetin are additives which have been found to improve the taste characteristics of smoke drawn through the filter element.