Patents by Inventor Floyd Van Hall

Floyd Van Hall 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).

  • Apparatus and method for compacting multi-sectional particulate containing filters
    Patent number: 4157370
    Abstract: A multi-sectional filter tip assembly is initially made with two charcoal filter sections and alternate sections of cellulose acetate fibrous material with a fibrous section at each end. The filter tip assembly is then compacted by a pin compactor which punches a recess into each fibrous end of the filter tip assembly while at the same time forcing the displaced acetate fibrous material into the charcoal sections to compact the charcoal. Upon removal of the pins of the pin compactor, a recess is formed in each end of the filter tip assembly.
    Type: Grant
    Filed: July 17, 1978
    Date of Patent: June 5, 1979
    Assignee: Liggett Group Inc.
    Inventor: Floyd Van Hall
  • Apparatus for compacting multi-sectional particulate containing filters
    Patent number: 4116602
    Abstract: A multi-sectional filter tip assembly is initially made with two charcoal filter sections and alternate sections of cellulose acetate fibrous material with a fibrous section at each end. The filter tip assembly is then compacted by a pin compactor which punches a recess into each fibrous end of the filter tip assembly while at the same time forcing the displaced acetate fibrous material into the charcoal sections to compact the charcoal. Upon removal of the pins of the pin compactor, a recess is formed in each end of the filter tip assembly.
    Type: Grant
    Filed: March 16, 1978
    Date of Patent: September 26, 1978
    Assignee: Liggett Group Inc.
    Inventor: Floyd Van Hall
  • Tobacco smoke filter
    Patent number: 4034765
    Abstract: This invention relates to a cigarette filter composed of two concentric cylindrical layers of fibrous filter materials, in which the inner cylindrical layer has a lower draw resistance than the outer cylindrical layer.
    Type: Grant
    Filed: October 30, 1975
    Date of Patent: July 12, 1977
    Assignee: Liggett & Myers Incorporated
    Inventor: Floyd Van Hall