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:
Mar. 27, 2012
Filed:
Jul. 09, 2004
Applicants:
Peter James Branton, Southampton, GB;
Philip Richard Hunt, Southampton, GB;
Inventors:
Peter James Branton, Southampton, GB;
Philip Richard Hunt, Southampton, GB;
Assignee:
British American Tobacco (Investments) Limited, London, GB;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A24B 15/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention describes a filter () with a first filter portion () comprising an adsorbent, for example carbon, and/or a catalyst, capable of reducing various vapor phase constituents of cigarette smoke. The adsorbent/catalyst is separated from a second filter portion by means of a barrier () having pores therein of pore size less than 0.1 μm. The invention also describes a smoking article in which a rod of smoking material, with or without encapsulated flavor, is attached to the above described filter.