Patents by Inventor Ian J. Polmear

Ian J. Polmear 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).

  • Wrought Al/Cu/Mg-type aluminum alloy of high strength in the temperature range between 0 and 250 degrees C.
    Patent number: 4772342
    Abstract: A wrought Al/Cu/Mg type aluminum alloy of high strength in the temperature range between 0 and 250.degree. C., having the following composition:Cu=5.0 to 7.0% by weightMg=0.3 to 0.8% by weightAg=0.2 to 1.0% by weightMn=0.3 to 1.0% by weightZr=0.1 to 0.25% by weightV=0.05 to 0.15% by weightSi<0.10% by weightIn this artificially aged state, the yield strength (0.2% limit) reached is more than 500 MPa at room temperature, almost 400 MPa at 200.degree. C. and about 300 MPa at 250.degree. C. At 180.degree. C., the creep strength is still more than 250 MPa after 500 hours.
    Type: Grant
    Filed: October 24, 1986
    Date of Patent: September 20, 1988
    Assignee: BBC Brown, Boveri & Company, Limited
    Inventor: Ian J. Polmear