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:
Apr. 23, 2013
Filed:
Oct. 09, 2009
Raquel Olegario, Richmond, VA (US);
San LI, Midlothian, VA (US);
Roland W. Dwyer, Richmond, VA (US);
Mike Braunshteyn, Richmond, VA (US);
Raquel Olegario, Richmond, VA (US);
San Li, Midlothian, VA (US);
Roland W. Dwyer, Richmond, VA (US);
Mike Braunshteyn, Richmond, VA (US);
Philip Morris USA Inc., Richmond, VA (US);
Abstract
A smoking article filter includes a valved flow restrictor and a cavity downstream of the flow restrictor. The flow restrictor includes an orifice or flow channel for directing smoke into the cavity. The filter is attached to the tobacco rod with tipping paper and includes an air-admissible ventilating zone at a location downstream of the restrictor. The valved restrictor can be used to isolate a sorbent bearing component of the filter from a flavor bearing component.