Patents by Inventor Chih C. Chen

Chih C. Chen 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).

  • High Ductility, High Modulus and Phthalate Free Impact Resistant Propylene Copolymer
    Publication number: 20240109988
    Abstract: The present invention provides phthalate free impact resistant polypropylene copolymer and methods of preparation, which are produced directly from the polymerization reactor system without further compounding of components which significantly alters the physical properties of the resulting polymer. The copolymer according to the present invention possesses both low temperature ductility and high flexural modulus, wherein said polymer is produced in the presence of a phthalate free ZN catalyst comprising urea component.
    Type: Application
    Filed: September 12, 2022
    Publication date: April 4, 2024
    Inventors: Gapgoung Kong, Chih-Jian Chen, Min-Chi Hsieh, Lei Zhang, Cyrus C.Y. Lee
  • Manual pipette
    Patent number: 5983733
    Abstract: A manual pipette having a cushioned hand grip area and a tip ejector. The ejector is located strategically so that an operator can easily manipulate either the ejector or a pipette fluid plunger which introduces and expels fluid to be sampled. The pipette is ergonomically balanced and designed to prevent operator fatigue. The pipette includes structure for in field calibration and volume variation.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: November 16, 1999
    Assignee: Hamilton Company
    Inventors: Victor C. Strandberg, Robert F. Scalese, Phillip C. Trenholme, Jan M. Conover, Scott T. Kozel, Chih C. Chen, Daniel J. Driscoll
  • Method of formation testing
    Patent number: 5703286
    Abstract: A new technique for interpreting pressure data measured during a formation test. The new technique uses an exact spherical flow model that considers the effects of flow line storage and that can be solved in closed, analytical form. This technique generates a type-curve that matches the entire measured pressure plot and that can accurately predict ultimate formation pressure during formation testing from a pressure plot that has not achieved steady state values near the formation pressure.
    Type: Grant
    Filed: October 20, 1995
    Date of Patent: December 30, 1997
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Mark A. Proett, Wilson C. Chin, Chih C. Chen