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

Tobacco smoke filter providing tobacco flavor enrichment, and method for producing same

Patent 4291711 Issued on September 29, 1981. Estimated Expiration Date: Icon_subject March 27, 1999. 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

2948282

3288145

3353543

3368566

3477440

3804695

3858587

Tobacco smoke filter
Patent #: 4034765
Issued on: 07/12/1977
Inventor: Hall

Apparatus for combining a tube with a cigarette filter
Patent #: 4037524
Issued on: 07/26/1977
Inventor: Hall

Smoking article having an ignition suppression disk
Patent #: 4091821
Issued on: 05/30/1978
Inventor: Scorzo

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Inventor

Assignee

Application

No. 06/024251 filed on 03/27/1979

US Classes:

131/336, Air131/340, By use of specific filter mass131/341, Plural diverse elements493/47By assembling dissimilar filter materials (e.g., fiber and powdered charcoal, etc.)

Examiners

Primary: Millin, V.

Attorney, Agent or Firm

International Classes

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

Abstract

A tobacco smoke filter is disclosed, which provides tobacco flavor enrichment of smoke passing therethrough. The filter comprises a reconstituted tobacco member formed from a coherent sheet of reconstituted tobacco which has been uniformly embossed with a series of parallel grooves, and then compacted and bonded into a self-sustaining dimensionally stable axially elongated body whose longitudinal axis extends parallel to the embossed grooves. The embossed grooves provide the reconstituted tobacco member with flow passages having a high surface area for contact with smoke passing therethrough, so as to enable the smoke to become tobacco flavor-enriched by extracing tobacco flavor from the reconstituted tobacco. The filter may also include an axially elongated fibrous filtering material member disposed concentrically with respect to the reconstituted tobacco member and having a draw resistance greater than that of the reconstituted tobacco member, whereby smoke passing through the filter will be directed primarily through the reconstituted tobacco member.

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