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:
Apr. 22, 2003
Filed:
Jun. 30, 1998
Applicant:
Inventor:
David John Dittrich, Southampton, GB;
Assignee:
British-American Tobacco (Investments) Limited, Southampton, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A24F 7/04 ; A24B 1/500 ;
U.S. Cl.
CPC ...
A24F 7/04 ; A24B 1/500 ;
Abstract
A cigarette is provided with a filter comprising a filter element of water-disintegratable paper. The paper is water swellable and/or the filter element comprises a water swellable agent. Tipping which interattaches the filter to the tobacco rod of the cigarette is anchored by means of water susceptible adhesive. Thus when the cigarette comes into contact with sufficient water, the filter element swells and the tipping opens away from the filter. This facilitates disintegration of the water-disintegratable paper.