Patents by Inventor Kha M. Pham

Kha M. Pham 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).

  • Lead storage battery with limited evolution of gas
    Patent number: 4131723
    Abstract: A maintenance-free lead storage battery comprises a container closed by a lid and containing an acid electrolyte together with a block of positive plates, negative plates and separators. The block of plates and separators is tightly packed in a case which is immersed in the electrolyte and which has openings in those of its walls which are in close contact with end ones of said plates.
    Type: Grant
    Filed: January 24, 1978
    Date of Patent: December 26, 1978
    Assignee: Compagnie Europeenne d'Accumulateurs
    Inventors: Gerard Dalibard, Kha M. Pham