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

Wrappers for specialty smoking devices

Patent 4779631 Issued on October 25, 1988. Estimated Expiration Date: Icon_subject March 6, 2007. 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

3049449

Wrapper for smoking articles and method
Patent #: 4433697
Issued on: 02/28/1984
Inventor: Cline ,   et al.

Method and smoking article wrapper for reducing sidestream smoke
Patent #: 4461311
Issued on: 07/24/1984
Inventor: Mathews ,   et al.

Smoking article having reduced sidestream smoke Patent #: 4561454
Issued on: 12/31/1985
Inventor: Guess

Inventors

Assignee

Application

No. 07/022860 filed on 03/06/1987

US Classes:

131/365, Wrapper or binder131/336Air

Examiners

Primary: Millin, V.

Attorney, Agent or Firm

International Classes

A24D 1/00 (20060101)
A24D 1/02 (20060101)
A24F 47/00 (20060101)
D21H 27/30 (20060101)
D21H 13/40 (20060101)
D21H 11/00 (20060101)
D21H 17/67 (20060101)
D21H 11/04 (20060101)
D21H 13/00 (20060101)
D21H 17/00 (20060101)

Abstract

A wrapper particularly useful for smoking articles of the type containing a burn fuel element and ceramic jacket. The wrapper includes an inner layer for surrounding the burn fuel element and jacket and an outer layer with the combination imparting controlled throttling properties. The inner layer may be a conventional cigarette wrapper material of cellulosic construction and having biased burned properties. The outer layer surrounds the inner sheet and preferably comprises cellulose fibers, titanium dioxide, attapulgite clay, high temperature resistant microfibers, and a burn enhancer. The outer wrapper also maintains permeability and pressure drop properties at temperatures in excess of 400° C. while the inner wrapper burns out resulting in generally infinite permeability after burning. The combination in use possesses sufficient mechanical strength to support the assembly of components in specialty smoking articles and as burned properties that produce an ash appearance similar to conventional cigarette ash and has a high degree of ash integrity.

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