Patents by Inventor Melvin J. Visser

Melvin J. Visser 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).

  • Removal of volatile contaminants from the vadose zone of contaminated ground
    Patent number: 4660639
    Abstract: Volatile contaminants are removed from the vadose zone of contaminated ground by pumping volatilized contaminants from the vadose zone using one or more vacuum extraction wells.
    Type: Grant
    Filed: February 6, 1986
    Date of Patent: April 28, 1987
    Assignee: The Upjohn Company
    Inventors: Melvin J. Visser, James J. Malot
  • Removal of volatile contaminants from the vadose zone of contaminated ground
    Patent number: 4593760
    Abstract: Volatile contaminants are removed from the vadose zone of contaminated ground by pumping volatilized contaminants from the vadose zone using one or more vacuum extraction wells.
    Type: Grant
    Filed: January 4, 1984
    Date of Patent: June 10, 1986
    Assignee: The Upjohn Company
    Inventors: Melvin J. Visser, James J. Malot
  • Odoriferous fishing device
    Patent number: 3953934
    Abstract: A fish attractant device and method for manufacturing the same adapted for use in its various embodiments as a sinker, lure, spinner, or the like to be immersed in water adjacent one or more hooks. The device is a rigid, sintered metal body having a network of interconnected pores filled with a fish attractant such as anise oil, menhaden oil, rhodinol, or bacon fat. The attractant is released into the water from the pores at a uniform, slow rate to attract fish to the hook. The method includes immersing the body in a container in a quantity of the fish attractant and evacuating the container to a predetermined vacuum to cause the attractant to impregnate the rigid body.
    Type: Grant
    Filed: April 2, 1975
    Date of Patent: May 4, 1976
    Inventor: Melvin J. Visser
  • Removal of volatile contaminants from the vadose zone of contaminated ground
    Patent number: RE33102
    Abstract: Volatile contaminants are removed from the vadose zone of contaminated ground by pumping volatilized contaminants from the vadose zone using one or more vacuum extraction wells.
    Type: Grant
    Filed: July 12, 1988
    Date of Patent: October 31, 1989
    Assignee: The Upjohn Company
    Inventors: Melvin J. Visser, James J. Malot