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:
Sep. 22, 2015
Filed:
Mar. 25, 2011
Zhaohua Luan, Ledgewood, NJ (US);
Mohammad R. Hajaligol, Glen Allen, VA (US);
Randall E. Baren, Glen Allen, VA (US);
Darin S. Colassaco, Midlothian, VA (US);
Firooz Rasouli, Pully, CH;
Zhaohua Luan, Ledgewood, NJ (US);
Mohammad R. Hajaligol, Glen Allen, VA (US);
Randall E. Baren, Glen Allen, VA (US);
Darin S. Colassaco, Midlothian, VA (US);
Firooz Rasouli, Pully, CH;
PHILIP MORRIS USA INC., Richmond, VA (US);
Abstract
A smoking article having a tobacco rod, which is adapted to produce mainstream smoke, and a filter attached to said tobacco rod. A permeable wrapping paper circumscribes the tobacco rod and the filter. The filter has an upstream end portion and a downstream end portion, and includes a flow restricting segment of smoke impermeable material, which includes at least one open flow passage therethrough to deliver mainstream smoke, and a cavity downstream of the flow restricting segment. The smoking article also includes at least one ventilation zone upstream of the flow restricting segment.