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:
May. 09, 1978
Filed:
Apr. 25, 1977
Applicant:
Inventor:
Floyd V Hall, Durham, NC (US);
Assignee:
Liggett & Myers Incorporated, Durham, NC (US);
Primary Examiner:
Int. Cl.
CPC ...
A24C / ;
U.S. Cl.
CPC ...
93 / ; 93 7 / ;
Abstract
This invention relates to a cigarette filter composed of two concentric cylindrical layers of fibrous filter materials, in which the inner cylindrical layer has a lower draw resistance than the outer cylindrical layer, and a method and apparatus for the manufacture thereof.