Patents by Inventor Luigi Stoppa

Luigi Stoppa 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).

  • Use of perfluoropolyethers in mechanical pumps
    Patent number: 4753744
    Abstract: A process for the generation of vacuums .ltoreq.5.10.sup.-4 torr by means of mechanical pumps, comprising using as operative fluid a perfluoropolyether having neutral end groups and containing light products, having an average molecular weight equal to or lower than 1,000, in amounts lower than or equal to 50 ppm.
    Type: Grant
    Filed: November 14, 1986
    Date of Patent: June 28, 1988
    Assignee: Ausimont S.p.A.
    Inventors: Enzo Calloni, Adriana Tasca, Luigi Stoppa