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:
Nov. 27, 1990
Filed:
Oct. 12, 1989
Applicant:
Inventors:
Warren A Brackmann, Mississauga, CA;
Tow P Liew, Westcliff-on-Sea, GB;
Assignee:
SK Hand Tool Corporation, Defiance, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A24D / ;
U.S. Cl.
CPC ...
131339 ; 131340 ;
Abstract
A cigarette filter rod element including an axially extending barrier tube of micro-fine fibres with a diameter of between 0.5 and 10 microns and located so that at least part of the gas flow passes through the wall of said barrier tube.