Patents by Inventor Basant Lal Tiwari

Basant Lal Tiwari 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).

  • Creep-resistant magnesium alloy die castings
    Patent number: 6264763
    Abstract: A family of die castable, creep-resistant magnesium alloys has been developed for high-temperature structural applications such as automotive engines and transmission cases. These alloys contain between 3% and 6% aluminum, 1.7% and 3.3% calcium, and up to 0.2% strontium. They have demonstrated 25% greater tensile and compressive creep resistance than AE42, a commercial aluminum, rare earth containing magnesium alloy, and corrosion resistance as good as AZ91D. These alloys are estimated to cost less than AZ91D and have good castability in metal molds as used in permanent mold casting and die casting.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: July 24, 2001
    Assignee: General Motors Corporation
    Inventors: Bob Ross Powell, Vadim Rezhets, Aihua A. Luo, Basant Lal Tiwari