Patents by Inventor Lao-Sou Su

Lao-Sou Su 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-purpose fluid for cutting and electrical discharge machining
    Patent number: 5349149
    Abstract: A cutting and machining fluid applicable to both cutting and electrical discharge machining. This cutting and machining fluid comprises a water-soluble organic compound that shows an electrical resistivity of not less than 10,000 .OMEGA..cm when it is contained in deionized water having an electrical resistivity of not less than 1,000,000 .OMEGA..cm, in a concentration of from 1 to 10 % by weight, a nonionic surface active agent, or a mixture of these. The organic compound is selected from the group of ethylene glycols, propylene glycols, glycol monoethers, and polyoxyethylene fatty acid esters.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: September 20, 1994
    Assignee: Castrol Limited Burmah Castrol House
    Inventors: Harumitsu Shiraki, Hiroyasu Sohtome, Kiyoshi Suzuki, Tetsutaro Uematsu, Lao-Sou Su