Patents by Inventor Ramjee Pathak

Ramjee Pathak 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).

  • Method of making selectively carburized forged powder metal parts
    Patent number: 4165243
    Abstract: A powder metallurgical process for producing dense low-alloy ferrous parts having selected carburized surface portions in which a metal powder of the desired composition is briquetted into a shape-retaining preform, the preform is masked, sintered, carburized whereafter the mask is removed and the resultant preform is forged to a desired final shape. The forged part is then quenched immediately following the forge operation for hardness or if desired it can be further heat treated in another manner to obtain other mechanical properties.
    Type: Grant
    Filed: May 31, 1978
    Date of Patent: August 21, 1979
    Assignee: Federal-Mogul Corporation
    Inventors: Myron C. Sarnes, Ramjee Pathak
  • Method of making powdered metal parts
    Patent number: 3992763
    Abstract: Gas carburizing of a briquetted powder metal preform prior to hot forging of the preform to acquire a fully dense, carburized powdered metal part.
    Type: Grant
    Filed: September 13, 1974
    Date of Patent: November 23, 1976
    Assignee: Federal-Mogul Corporation
    Inventors: Robert Nelson Haynie, Ramjee Pathak