Patents by Inventor Stephen Hsu

Stephen Hsu 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).

  • Patent number: 6206764
    Abstract: The present invention provides a method for machining hard materials using the machining fluids containing long chain alcohol in which the machining fluid is applied to a machining tool and then lubricates the machining of the workpiece by the machining tool and protects the machining tool during machining. The method is particularly useful when used with machining tools having a Mohs hardness of at least 9 and is most particularly useful when used with diamond machining tools.
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: March 27, 2001
    Assignee: The United States of America as represented by the Secretary of Commerce
    Inventors: Stephen Hsu, Tsi-Neng Ying, Jia-Ming Gu, Yu-Shu Wang, Richard S. Gates
  • Patent number: 5654128
    Abstract: A single resist layer lift-off process for forming patterned layers on a substrate, wherein a post-soak bake is used to control the extent to which chlorobenzene penetrates the resist layer. A post-metallization bake can also be employed to improve lift-off of the resist layer. The process of the present invention provides the resist profile with increased overhang length and the sidewalls of the resist profile with a negative slope. Such increased overhang length and negative slope prevent metallization of the sidewalls of the resist, and thus facilitate more rapid removal of the resist during lift-off.
    Type: Grant
    Filed: February 15, 1996
    Date of Patent: August 5, 1997
    Assignee: NGK Insulators, Ltd.
    Inventor: Duanfu Stephen Hsu
  • Patent number: 5434087
    Abstract: An improved method for performing immunoassays whereby specific binding proteins for vitamin B12, folate and other target analytes are utilized with antibodies with different specificities for the binding proteins. Antibodies bridge the specific binding protein directly or indirectly to a capturable material.
    Type: Grant
    Filed: February 24, 1993
    Date of Patent: July 18, 1995
    Assignee: Abbott Laboratories
    Inventors: Michael J. Beggs, Linda J. Sohn, Robert J. Herrmann, Stephen Hsu, David J. Hawksworth, Mary S. Pinkus