Patents by Inventor Paul Francis Clarke

Paul Francis Clarke 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).

  • Tobacco smoke filter
    Patent number: 11918035
    Abstract: A stand alone tobacco smoke filter or filter element for use with a smoking article comprising a wrapper engaged around a longitudinally extending core of tobacco smoke filtering material, wherein at least one end of the wrapper extends beyond the end of the core around which it is engaged, to define a cavity at the end of the filter which faces the smoking article in use.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: March 5, 2024
    Assignee: Filtrona Filter Products Development Co. Pte. Ltd.
    Inventors: Paul Francis Clarke, Ahmad Fashihul Lisan
  • TOBACCO SMOKE FILTER
    Publication number: 20230346011
    Abstract: A stand alone tobacco smoke filter or filter element for use with a smoking article comprising a wrapper engaged around a longitudinally extending core of tobacco smoke filtering material, wherein at least one end of the wrapper extends beyond the end of the core around which it is engaged, to define a cavity at the end of the filter which faces the smoking article in use.
    Type: Application
    Filed: July 10, 2023
    Publication date: November 2, 2023
    Inventors: Paul Francis CLARKE, Ahmad Fashihul LISAN
  • TOBACCO SMOKE FILTER
    Publication number: 20200015515
    Abstract: A stand alone tobacco smoke filter or filter element for use with a smoking article comprising a wrapper engaged around a longitudinally extending core of tobacco smoke filtering material, wherein at least one end of the wrapper extends beyond the end of the core around which it is engaged, to define a cavity at the end of the filter which faces the smoking article in use.
    Type: Application
    Filed: August 28, 2019
    Publication date: January 16, 2020
    Inventors: Paul Francis CLARKE, Ahmad Fashihul LISAN
  • TOBACCO SMOKE FILTER
    Publication number: 20130112216
    Abstract: A stand alone tobacco smoke filter or filter element for use with a smoking article comprising a wrapper engaged around a longitudinally extending core of tobacco smoke filtering material, wherein at least one end of the wrapper extends beyond the end of the core around which it is engaged, to define a cavity at the end of the filter which faces the smoking article in use.
    Type: Application
    Filed: June 8, 2011
    Publication date: May 9, 2013
    Inventors: Paul Francis Clarke, Ahmad Fashihul Lisan
  • TOBACCO SMOKE FILTER
    Publication number: 20120067359
    Abstract: A tobacco smoke filter or filter element comprising: a tobacco smoke filtering material including paper; and a flavour enhancing additive.
    Type: Application
    Filed: May 25, 2010
    Publication date: March 22, 2012
    Inventors: Paul Francis Clarke, Anthony Denis McCormick, Tom Cravotta, Jack Rothenhoefer
  • Smokers filter
    Patent number: 7980250
    Abstract: A tobacco smoke filter which has a tar retention of at most 50% and comprises a relatively high draw resistance downstream filtering plug of at most 50% tar retention, a relatively low draw resistance upstream filter plug of at most 22% tar retention spaced longitudinally upstream therefrom, and a filter wrapper engaging around and joining the spaced plugs to define a cavity therebetween.
    Type: Grant
    Filed: October 13, 2003
    Date of Patent: July 19, 2011
    Assignee: Filtrona International Limited
    Inventor: Paul Francis Clarke
  • TOBACCO SMOKE FILTER
    Publication number: 20110023900
    Abstract: A tobacco smoke filter or filter element comprising a cylindrical plug of a substantially homogeneous filtering material of circumference between 14.0 and 23.2 mm, wherein the substantially homogeneous filtering material comprises a plurality of randomly oriented staple fibres.
    Type: Application
    Filed: January 23, 2009
    Publication date: February 3, 2011
    Inventors: Paul Francis Clarke, Daniel S. Araujo
  • Tobacco smoke filter
    Patent number: 6302114
    Abstract: The present invention provides a tobacco smoke filter or filter element having a longitudinally extending core (2) and a wrapper (4) engaged around the core (2), the wrapper (4) having particulate additive (6) adhered to one or more portion(s) of the radially inner face thereof with said wrapper (4) being free of additive around its circumference at one or both ends of the core.
    Type: Grant
    Filed: October 14, 1992
    Date of Patent: October 16, 2001
    Assignee: Cigarette Components Limited
    Inventors: Paul Francis Clarke, John Charlton
  • Particulate sorbent smoke filter
    Patent number: 6080457
    Abstract: A smoke filter consists of substrate threads and/or strips each pre-coated with particulate sorbent (e.g. activated carbon granules), gathered together in solid or tubular rod form e.g. within a containing sleeve. When the gathered threads and/or strips form a tubular body, this may be provided with a core.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: June 27, 2000
    Assignee: Cigarette Components Limited
    Inventors: John Charlton, Paul Francis Clarke, Ernest Brian Hayes
  • Concentric core filter
    Patent number: 5787902
    Abstract: A ventilated cigarette filter having a tobacco smoke filtering core, a tubular body of air-permeable material around the core, and an outer wrapper engaged around the tubular body and providing in use for the lateral ingress of external air therethrough into the tubular body, the core comprising a plurality of longitudinally aligned plugs of which one is an unwrapped buccal end plug of material which is the same as or similar to that of the surrounding tubular body so as to give a substantially uniform or integral buccal end appearance.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: August 4, 1998
    Assignee: Cigarette Components Limited
    Inventors: Richard Karl James Shepherd, John Charlton, Paul Francis Clarke
  • Smoke filter containing particulate smoke modifying additive
    Patent number: 5662126
    Abstract: A filter having a longitudinal axis and having a tube formed by at least one strip [2] which is pre-coated with particulate smoke modifying additive [4] adhering thereto and which curves through at least 360.degree. about the longitudinal axis.
    Type: Grant
    Filed: November 7, 1996
    Date of Patent: September 2, 1997
    Assignee: Cigarette Components Limited
    Inventors: John Charlton, Paul Francis Clarke