Patents by Inventor Rana Mitra

Rana Mitra 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).

  • Process for stretch forming age-hardened aluminum alloy sheets
    Patent number: 6033499
    Abstract: In the stretch forming of aluminum alloys using a punch and a mating die cavity, the stretch formability of a sheet of age-hardened aluminum alloy is increased by selectively heat treating the sheet to soften at least a portion of the sheet that will underlie a punch surface but not be drawn over a radius of the punch.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: March 7, 2000
    Assignee: General Motors Corporation
    Inventor: Rana Mitra