Patents by Inventor Martin Graham Duke

Martin Graham Duke 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).

  • Patent number: 9961936
    Abstract: Filter for a smoking product, the filter including a first filter segment and a second filter segment, wherein the first filter segment includes a component that is given off into a smoke stream passing through a filter outlet opening, and the second filter segment includes a sorption means that absorbs a component from a smoke stream passing through the filter inlet opening.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: May 8, 2018
    Assignee: BRITISH AMERICAN TOBACCO (GERMANY) GMBH
    Inventors: Horst Grzonka, Markus Schosnig, Eduard Nica, Paulo Oliveira, John Richardson, Martin Graham Duke, Maya Nikolaeva
  • Patent number: 8752556
    Abstract: A filter element having a longitudinally extending core and a wrapper (8) engaged around the core, wherein the core comprise filtration material (6) and optionally a particulate material (7) interspersed in the filtration material, and the wrapper (8) comprises a particulate material (9) adhered to two or more portions of said wrapper (8) wherein at least one of said two or more portions extends over the full longitudinal length of said wrapper. Also taught herein is a smoking article comprising said filter element and/or filter comprising said filter element.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: June 17, 2014
    Assignee: British American Tobacco (Investments) Limited
    Inventors: Peter Rex White, Martin Graham Duke, William David Lewis
  • Publication number: 20120055496
    Abstract: Filter for a smoking product (1), comprising a first filter segment (2) and a second filter segment (3), wherein the first filter segment (2) comprises a component that is given off into a smoke stream passing through a filter outlet opening (4), and the second filter segment (3) comprises a sorption means (6) that absorbs a component from a smoke stream passing through the filter inlet opening (5).
    Type: Application
    Filed: November 4, 2009
    Publication date: March 8, 2012
    Inventors: Horst Grzonka, Markus Schosnig, Eduard Nica, Paulo Oliveira, John Richardson, Martin Graham Duke, Maya Nikolaeva
  • Publication number: 20100108085
    Abstract: A filter for a smoking article comprising first and second sections, the first section being at the mouth end of the filter and comprising a cylindrical element circumscribed by a wrapper and having a hollow portion extending therethrough, and the second section being longitudinally aligned with and adjacent to the first section and comprising a filtration material. The second section comprises a particulate material in a circumferential region and extending to the end of the second section immediately adjacent the first section. Also provided is a smoking article incorporating a filter according to the invention.
    Type: Application
    Filed: November 20, 2007
    Publication date: May 6, 2010
    Inventor: Martin Graham Duke
  • Publication number: 20090288671
    Abstract: A filter element having a longitudinally extending core and a wrapper (8) engaged around the core, wherein the core comprise filtration material (6) and optionally a particulate material (7) interspersed in the filtration material, and the wrapper (8) comprises a particulate material (9) adhered to two or more portions of said wrapper (8) wherein at least one of said two or more portions extends over the full longitudinal length of said wrapper. Also taught herein is a smoking article comprising said filter element and/or filter comprising said filter element.
    Type: Application
    Filed: January 23, 2007
    Publication date: November 26, 2009
    Applicant: BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED
    Inventors: Peter Rex White, Martin Graham Duke, William David Lewis
  • Patent number: 5657772
    Abstract: A filter for a smoking article incorporating particles coated with platinum selectively reduces the amount of volatiles of mainstream smoking article smoke passing through the filter. The platinum may be a continuous or discontinuous coating, usually on a coating of another metal, and this coating(s) will usually encapsulate the particle substrate. This substrate may be low activity activated carbon.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: August 19, 1997
    Assignee: Rothmans International Services Limited
    Inventors: Martin Graham Duke, Edward Dennis John