Patents by Inventor Peter J. Bohlander

Peter J. Bohlander 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).

  • Compound filter
    Patent number: 4469112
    Abstract: A compound cigarette filter, the filter having the ability to deliver substantially constant tar and nicotine as the cigarette is smoked. The compound filter comprises a barrier positioned upstream and in abutting relationship with at least one filter segment, the barrier containing passageways permitting the passage of smoke from a tobacco column to the filter segment, the total cross-sectional passageway area being from 0.5 to 3 square millimeters, the compound filter having an initial totally encapsulated pressure drop of at least 90 mm. H.sub.2 O.
    Type: Grant
    Filed: August 23, 1982
    Date of Patent: September 4, 1984
    Assignee: Celanese Corporation
    Inventors: Colin L. Browne, Charles H. Keith, Peter J. Bohlander
  • Process for preparing compound filter
    Patent number: 4460001
    Abstract: A process for preparing a compound cigarette filter, the filter having the ability to deliver substantially constant tar and nicotine as the cigarette is smoked. The compound filter comprises a barrier positioned upstream and in abutting relationship with at least one filter segment, the barrier containing passageways permitting the passage of smoke from a tobacco column to the filter segment, the total cross-sectional passageway area being from 0.5 to 3 square millimeters, the compound filter having an initial totally encapsulated pressure drop of at least 90 mm. H.sub.2 O.
    Type: Grant
    Filed: August 23, 1982
    Date of Patent: July 17, 1984
    Assignee: Celanese Corporation
    Inventors: Colin L. Browne, Charles H. Keith, Peter J. Bohlander