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:
Jun. 14, 1983
Filed:
Mar. 19, 1981
Applicant:
Inventors:
Martin L Reynolds, Louisville, KY (US);
Robert R Johnson, Louisville, KY (US);
Assignee:
Brown & Williamson Tobacco Corporation, Louisville, KY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A24D / ; A24D / ;
U.S. Cl.
CPC ...
131336 ; 131361 ; 131362 ; 131365 ; 131 94 ; 131339 ;
Abstract
A filter for a cigarette includes a porous filter rod circumscribed by a non-porous wrapper wherein the filter rod with the non-porous wrapper therearound is provided with grooves extending from one end thereof a preselected distance longitudinally therealong. The grooves are open to the atmosphere and may be oriented to extend to the mouth end of the filter when connected to a cigarette, to the tobacco end of the filter when connected to the cigarette, or non-connecting grooves which extend from each end of the filter element a preselected distance therealong.