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. 24, 2004
Filed:
Jun. 24, 2002
James N. Figlar, Macon, GA (US);
Brian E. Tucker, Macon, GA (US);
F. Kelley St. Charles, Perry, GA (US);
Brown & Williamson Tobacco Corporation, Louisville, KY (US);
Abstract
A cigarette filter includes a multiple section filter which reduces the level of predetermined smoke constituents. The filter includes a fibrous filter plug section, a selective adsorbent section, and a general adsorbent section co-axially aligned in tandem. The selective adsorbent section includes a selective absorbent material which is a phenol-formaldehyde resin matrix surface-functionalized with mainly primary and secondary amine functional groups which removes specific smoke constituents from the tobacco smoke. The general adsorbent section is a material capable of adsorbing a range of chemical compounds without a high degree of specificity.