Patents by Inventor Ding Feng Shen

Ding Feng Shen 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).

  • Pumpably verifiable fluid fiber compositions
    Patent number: 6790275
    Abstract: The invention relates to fiber compositions that can be pumped and metered in the fashion of fluid chemical admixtures into a concrete mix, thereby enabling the fibers to be dispensed by concrete ready-mix plant operators who can provide verification of fiber administration and dosage. The fibers, particularly plastic shrinkage control fibers having large cumulative surface area, are suspended in an aqueous or non-aqueous medium such that their surface area is already wetted out, thereby virtually assuring that substantial uniform fiber dispersion can be achieved without clumping and the delay that is usually required by fiber intermixing.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: September 14, 2004
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Michael B. Macklin, Anandakumar Ranganathan, Klaus-Alexander Rieder, Ding Feng Shen, Michael Buchanan, Randall Fierke, Jessica Verrill, Donald Indge, David Agresti, Paul Westgate
  • Viscosity modifying agents and water reducers
    Publication number: 20040072939
    Abstract: The present invention relates to a process for making a stable suspension comprising a polycarboxylate superplasticizer and a viscosity modifying agent for modifying a hydratable cementitous composition. A composition for modifying cementitious compositions, as well as the cementitious compositions, are also described herein.
    Type: Application
    Filed: October 11, 2002
    Publication date: April 15, 2004
    Inventors: Charles R. Cornman, David William Hughes, Ara Avedis Jeknavorian, Hideo Koyata, Ding Feng Shen, Chia-Chih Ou
  • Pumpably verifiable fluid fiber compositions
    Publication number: 20030056695
    Abstract: The invention relates to fiber compositions that can be pumped and metered in the fashion of fluid chemical admixtures into a concrete mix, thereby enabling the fibers to be dispensed by concrete ready-mix plant operators who can provide verification of fiber administration and dosage. The fibers, particularly plastic shrinkage control fibers having large cumulative surface area, are suspended in an aqueous or non-aqueous medium such that their surface area is already wetted out, thereby virtually assuring that substantial uniform fiber dispersion can be achieved without clumping and the delay that is usually required by fiber intermixing.
    Type: Application
    Filed: March 29, 2002
    Publication date: March 27, 2003
    Applicant: W.R. GRACE & CO.-CONN.
    Inventors: Michael B. Macklin, Anandakumar Ranganathan, Klaus-Alexander Rieder, Ding Feng Shen, Michael Buchanan, Randall Fierke, Jessica Verrill, Donald Indge, David Agresti, Paul Westgate
  • Emulsified comb polymer and defoaming agent composition and method of making same
    Patent number: 6139623
    Abstract: Exemplary emulsion admixture for use in hydraulic cement compositions formed by emulsifying an antifoaming agent, surfactant, and a comb polymer having a carbon-containing backbone to which are attached cement-anchoring members and oxyalkylene groups. A method of making a stable emulsion admixture comprising the comb polymer, as well as a hydraulic cement composition comprising the admixture, are also described.
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: October 31, 2000
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David Charles Darwin, Robert T. Taylor, Ara A. Jeknavorian, Ding Feng Shen