Patents by Inventor Vu H. Viet

Vu H. Viet 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).

  • Dual linear actuator
    Patent number: 6688211
    Abstract: A dual linear actuator for allowing a tool to perform multiple actions either simultaneously or independently of one another.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: February 10, 2004
    Inventor: Vu H. Viet
  • Electrical insulating system
    Patent number: 4450424
    Abstract: An insulating system is described that incorporates a cellulosic material which is impregnated with a nitrogen content no less than 0.2% by weight and a overall density not greater than 0.9 gm/cm.sup.3. This cellulosic material when impregnated by a dielectric liquid such as transformer oil, exhibits a more uniform electrical stress distribution than papers having a density greater than 0.9 gm/cm.sup.3. The insulating system thereformed is particularly useful for application in low stress areas such as the layer insulation in a distribution class transformer.
    Type: Grant
    Filed: May 10, 1982
    Date of Patent: May 22, 1984
    Assignee: McGraw-Edison Company
    Inventors: Fred S. Sadler, Paul F. Hettwer, Vu H. Viet, Clarence R. Acker
  • Process for making electrical insulating paper and the product thereof
    Patent number: 4407697
    Abstract: The invention relates to a method for improving the thermal stability and dielectric integrity of a cellulosic web product. The cellulosic web is impregnated with a nitrogen donor compound such that the web contains not less than 0.2% by weight of the compound and thereafter impregnated with an aqueous vegetable protein solution at a pH of not less than about 8.5.
    Type: Grant
    Filed: April 5, 1982
    Date of Patent: October 4, 1983
    Assignee: McGraw-Edison Company
    Inventors: Fred S. Sadler, Paul F. Hettwer, Vu H. Viet, Clarance R. Acker