Patents by Inventor Terry V. Friesen

Terry V. Friesen 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).

  • Lubricating oils having carbonated sulfurized metal alkyl phenates and carbonated metal alkyl aryl sulfonates
    Patent number: 6294506
    Abstract: A lubricating oil composition has a major amount of an oil of lubricating viscosity, a minor amount of a carbonated sulfurized metal alkyl phenate and, a minor amount of a carbonated metal alkyl aryl sulfonate. The total base equivalents donated by the phenate is more than 85% of the total base equivalents donated by the phenate and sulfonate. The composition also has alkenyl or alkyl succinimide additives that are the reaction product of a high molecular weight alkenyl- or alkyl-substituted succinic anhydride and a polyalkylene polyamine having an average of greater than four nitrogen atoms per mole, wherein the reaction product is post-treated with a cyclic carbonate.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: September 25, 2001
    Assignee: Chevron Chemical Company
    Inventors: Terry V. Friesen, James J. Harrison, William R. Ruhe, Jr.
  • Sailboard assembly having a foot-operable steering assembly
    Patent number: 4771723
    Abstract: A sailboard assembly is disclosed which has a body on which the user stands, a mast, boom and sail assembly for propulsion of the board. The mast-boom-sail assembly is mounted to the board by a mast mounting assembly which permits limited angular displacement of the mast about a generally normal orientation to the board for maneuvering of the center of pressure of the sail and yet provides support of the mast above the board upon release of the boom. The sailboard assembly also preferably includes a steering assembly having a rudder and foot-operated turntables that are used to turn the rudder.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: September 20, 1988
    Inventor: Terry V. Friesen
  • Sailboard assembly having a limited diplacement mast
    Patent number: 4679516
    Abstract: A sailboard assembly is disclosed which has a body on which the user stands, a mast, boom and sail assembly for propulsion of the board. The mast-boom-sail assembly is mounted to the board by a mast mounting assembly which permits limited angular displacement of the mast about a generally normal orientation to the board for maneuvering of the center of pressure of the sail and yet provides support of the mast above the board upon release of the boom. The sailboard assembly also preferably includes a steering assembly having a rudder and foot-operated turntables that are used to turn the rudder.
    Type: Grant
    Filed: March 7, 1986
    Date of Patent: July 14, 1987
    Inventor: Terry V. Friesen