Patents by Inventor Mei Liu

Mei Liu 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).

  • Pyrazole intermediates in a method of preparation of &bgr;-amino acids
    Patent number: 6191283
    Abstract: Pyrazole intermediates in a method for the preparation of &bgr;-amino acid compounds are provided. The method includes contacting an amine nucleophile with an &agr;,&bgr;-unsaturated amide compound in the presence of a chiral Lewis acid complex. The chiral Lewis acid complex is formed from an azophilic metal salt and a chiral bisoxazolinylmethane compound. The selective amidolysis of one enantiomer of the &bgr;-aminoamide product is also described.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: February 20, 2001
    Assignee: NDSU-Research Foundation
    Inventors: Mukund Prahalada Rao Sibi, John Joseph Shay, Craig Peter Jasperse, Mei Liu
  • Method of preparation of .beta.-amino acids
    Patent number: 6080857
    Abstract: A method for the preparation of .beta.-amino acid compounds is provided. The method includes contacting an amine nucleophile with an .alpha.,.beta.-unsaturated amide compound in the presence of a chiral Lewis acid complex. The chiral Lewis acid complex is formed from an azophilic metal salt and a chiral bisoxazolinylmethane compound. The selective amidolysis of one enantiomer of the .beta.-aminoamide product is also described.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: June 27, 2000
    Assignee: North Dakota State University
    Inventors: Mukund Prahalada Rao Sibi, John Joseph Shay, Craig Peter Jasperse, Mei Liu
  • Mask pellicle remove tool
    Patent number: 5953107
    Abstract: A mask pellicle removal methods for separating a mask pellicle from a glass reticle to which it is bonded by prying against its releasable bond. The methods includes a table support for nesting the glass reticle and for supporting a manually operated prying mechanism having only the necessary degrees of freedom for prying free the mask pellicle without damaging the glass reticle.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: September 14, 1999
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Meng-Chun Li, Hsieh-Mei Liu
  • Liquid crystal display monitor
    Patent number: D440968
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: April 24, 2001
    Assignee: Proview Electronics (Taiwan) Co., Ltd.
    Inventors: Yuan-Shie Chang, Yu-Mei Liu, Shu-Fen Ke
  • Liquid crystal display
    Patent number: D416877
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: November 23, 1999
    Assignee: Dual Technology Corporation
    Inventors: Yu-Mei Liu, Yuan-Shie Chang