Patents by Inventor Alfred D. Schweizer

Alfred D. Schweizer 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).

  • Smoking materials
    Patent number: 4286604
    Abstract: The invention is concerned with a tobacco substitute which is made by subjecting a strand of viscose fibres to a controlled pyrolysis until the organic residue contains at least 90% carbon by weight, and loading the carbon strand with ingredients for smoking.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: September 1, 1981
    Assignee: Gallaher Limited
    Inventors: Jacques Ehretsmann, Robert D. Cowling, Alfred D. Schweizer, William M. Caldwell, Dennis F. Boyd, Robert J. Boyd
  • Smoking rod wrapper
    Patent number: 4236532
    Abstract: A wrapper for a smoking rod has screen printed on its surface a series of dots containing a volatile additive which is transferred into the main stream smoke when the smoking rod is smoked.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: December 2, 1980
    Assignee: Gallaher Limited
    Inventors: Alfred D. Schweizer, William G. Erskine, Daniel Turpin
  • Uronic oxidation of cellulose
    Patent number: 4100341
    Abstract: Uronic oxidation of cellulose is achieved by reacting cellulose with aqueous nitric acid containing nitrogen dioxide.
    Type: Grant
    Filed: March 7, 1974
    Date of Patent: July 11, 1978
    Assignee: Gallaher Limited
    Inventors: Marcel Brasey, Alfred D. Schweizer, James C. Shorrock