Patents by Inventor Leon W. Anders

Leon W. Anders 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).

  • Indicator material
    Patent number: 4328181
    Abstract: Indicator material for monitoring personal exposure to hazardous substances in ambient air comprising a pigment material, a binder and a sensitizer coated upon a transparent support member as a porous coating which permits gaseous diffusion throughout the coating is disclosed. Detection or monitoring is effected when the indicator material undergoes a visually observable reaction with hazardous material in the atmosphere at room temperature.
    Type: Grant
    Filed: July 6, 1979
    Date of Patent: May 4, 1982
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventors: Leon W. Anders, David C. Weigel
  • Respirator
    Patent number: 4155358
    Abstract: A disposable valveless chemical cartridge respirator for filtration of vinyl chloride monomer having an end of service life indicator is disclosed.
    Type: Grant
    Filed: December 13, 1976
    Date of Patent: May 22, 1979
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Jerome W. McAllister, James A. Ord, Jr., Leon W. Anders, Gunter A. Kohler
  • Sorbent material and a respirator containing the sorbent material
    Patent number: 4133309
    Abstract: A complex granular material comprising manganese oxide-activated alumina is disclosed. The resulting material can be used in respirators to reduce the sulfur dioxide and HCl intake of the ambient atmosphere.
    Type: Grant
    Filed: May 13, 1977
    Date of Patent: January 9, 1979
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gunter A. Kohler, Leon W. Anders