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. 30, 1978
Filed:
Apr. 25, 1975
Applicant:
Inventors:
Arthur Morton Ihrig, Greensboro, NC (US);
David Lynn Williams, Greensboro, NC (US);
Assignee:
Loews Theatres, Inc., New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A24B / ; B01D / ;
U.S. Cl.
CPC ...
131-9 ; 55 68 ; 131 109 ; 131264 ;
Abstract
An improved filter for tobacco products such as cigarettes is described, providing for selective HCN absorption. The selective adsorbant is a complex formed from a polydentate amine and a metal ion selected from the group consisting of zinc, iron (II), copper and nickel. The complex may be improved in its effectiveness by further combination with a polyalkylene oxide which acts synergistically therewith. Illustrative materials are the zinc complex of ethylenediamine employing polyethylene oxide as a synergist.