Patents by Inventor Roger S. Slagle

Roger S. Slagle has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core
    Patent number: 5622190
    Abstract: A concentric smoking filter in which the peripheral filter medium is a fibrous tow, such as fibrous cellulose acetate tow, and the core filter medium is a web material, such as paper, loaded with carbon particles, is provided. The filter improves the taste, particularly, of "ultra-light" cigarettes.
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: April 22, 1997
    Assignee: Philip Morris Incorporated
    Inventors: Cynthia W. Arterbery, W. Timothy Callaham, Gus D. Keritsis, Donald E. Laslie, Kenneth A. Newman, Roger S. Slagle, Morris F. White, Jr.
  • Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core
    Patent number: 5365951
    Abstract: A concentric smoking filter in which the peripheral filter medium is a fibrous tow, such as fibrous cellulose acetate tow, and the core filter medium is a web material, such as paper, loaded with carbon particles, is provided. The filter improves the taste, particularly, of "ultra-light" cigarettes.
    Type: Grant
    Filed: January 19, 1993
    Date of Patent: November 22, 1994
    Assignee: Philip Morris Incorporated
    Inventors: Cynthia W. Arterbery, W. Timothy Callaham, Gus D. Keritsis, Donald E. Laslie, Kenneth A. Newman, Roger S. Slagle, Morris F. White, Jr.
  • Cigarette and filter therefor
    Patent number: 5107863
    Abstract: A cigarette filter 12 comprises a rod of filter material having an inner zone 16 of 60% to 90% filter efficiency and an outer zone 18 of 10% to 40% filter efficiency, the inner zone occupying from 30% to 60% of the cross-sectional area of the filter. The filter is attached to a tobacco rod 10 by a tipping 14 having perforations 24 admitting air into the filter.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: April 28, 1992
    Assignee: Fabriques de Tabac Reunies, S.A.
    Inventors: Urs Nyffeler, Roger S. Slagle, Andreas Stathopoulos