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:
Feb. 01, 2005
Filed:
Feb. 07, 2001
A. Clifton Lilly, Jr., Chesterfield, VA (US);
Kent B. Koller, Chesterfield, VA (US);
John B. Paine, Iii, Midlothian, VA (US);
Purusottam Jena, Richmond, VA (US);
Bijan K. Rao, Richmond, VA (US);
A. Clifton Lilly, Jr., Chesterfield, VA (US);
Kent B. Koller, Chesterfield, VA (US);
John B. Paine, III, Midlothian, VA (US);
Purusottam Jena, Richmond, VA (US);
Bijan K. Rao, Richmond, VA (US);
Philip Morris USA Inc., Richmond, VA (US);
Abstract
A filter such as a cigarette filter having a metal reagent which selectively binds with a gaseous component of a gas stream such as tobacco smoke. The metal reagent comprises nanometer or micrometer size clusters of a transition metal or alloy containing a transition metal. The transition metal can be incorporated in an intermetallic compound such as titanium aluminide or iron aluminide. The metal clusters can be incorporated in or on a support material such as silica gel, porous carbon or a zeolite. The metal reagent can remove the gaseous component by selectively binding to unsaturated hydrocarbons such as 1,3-butadiene. The binding can occur by insertion of a metal atom of the metal reagent into a C—H bond or a C—C bond of the gaseous component.