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. 14, 1995
Filed:
Nov. 24, 1993
Applicant:
Inventor:
William J Casey, III, Clemmons, NC (US);
Assignee:
R. J. Reynolds Tobacco Company, Winston-Salem, NC (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
A24D / ;
U.S. Cl.
CPC ...
131336 ; 131339 ;
Abstract
A cigarette filter connected to a tobacco rod is provided with air dilution holes which extend radially into the fibrous material of the filter to a depth of about 1.0 to about 4.0 millimeters. When a smoker draws on the cigarette, air admitted into the air dilution holes flows to a central or core region of the filter and thence to the smoker's mouth. Mainstream smoke from the tobacco rod flows into the filter and is diverted to an annular region surrounding the core region.