U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Filter cigarette

Patent 4570649 Issued on February 18, 1986. Estimated Expiration Date: Icon_subject February 22, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

1015723

2269995

2693193

2841153

2923647

2936763

3057360

3116741

3232299

3283762

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Inventors

Application

No. 06/582600 filed on 02/22/1984

US Classes:

131/336, Air131/338Having means to vary smoke flow rate

Examiners

Primary: Millin, V.
Assistant: Macey, H.

Attorney, Agent or Firm

International Classes

A24D 3/00 (20060101)
A24D 3/04 (20060101)

Abstract

A variable dilution filter cigarette is provided which includes a substantially cylindrical tobacco rod, an axially aligned, substantially cylindrical wrapped filter plug, and tipping paper which circumscribes the filter plug and joins the filter plug to the tobacco rod. The filter plug has first and second ends, which are open to permit the passage of air and smoke. The plug wrap is substantially air-impermeable and is divided into a mouth-end band, a central band, and a rod-end band having a first opening. The first and third bands are attached to the filter. The tipping paper is also substantially air-impermeable, circumscribes the filter plug, and extends from the mouth end of the filter plug to a position on the tobacco rod adjacent the rod end of the filter plug. The tipping paper is divided into first and second bands, the first band extending from the mouth end of the filter plug to a position overlying the rod-end band. The second band abuts the first band and overlaps and attaches the rod end of the filter plug to the abutting end of the tobacco rod. The first band is attached to the plug wrap only at the central band for rotation therewith about the longitudinal axis of the filter plug and has a second opening overlying the rod-end band such that the second opening is rotatable into registry with the first opening.

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