Patents by Inventor David C. Darwin

David C. Darwin 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).

  • Waterproofing and preservative compositions for organic material
    Patent number: 9125403
    Abstract: Compositions, kits and methods using a cationic salt of a dioic acid to treat organic material, including wood and wood-containing material, are disclosed. The treatment may be supplemented with a second salt. Reductions in the rate and/or impact of water absorption, dimensional instability and living organism decay are achieved for organic materials.
    Type: Grant
    Filed: April 3, 2013
    Date of Patent: September 8, 2015
    Assignee: Hycrete, Inc.
    Inventors: David C. Darwin, Philip S. Rhodes, Jason S. Tuerack
  • WATERPROOFING AND PRESERVATIVE COMPOSITIONS FOR ORGANIC MATERIAL
    Publication number: 20130337280
    Abstract: Compositions, kits and methods using a cationic salt of a dioic acid to treat organic material, including wood and wood-containing material, are disclosed. The treatment may be supplemented with a second salt. Reductions in the rate and/or impact of water absorption, dimensional instability and living organism decay are achieved for organic materials.
    Type: Application
    Filed: April 3, 2013
    Publication date: December 19, 2013
    Applicant: Hycrete, Inc.
    Inventors: David C. Darwin, Philip S. Rhodes, Jason S. Tuerack
  • Surface Applied Waterproofing Compositions And Methods For Concrete Systems
    Publication number: 20100196723
    Abstract: Water soluble compositions for use in sealing and/or waterproofing concrete-containing materials and surfaces are disclosed. The compositions include carboxylic acid and polysiloxane constituents. Despite the water soluble properties of the composition, the treatments are effective in delivering an advantageous level of moisture resistance to the treated concrete-containing structure and/or surface. Synergistic properties of the composition deliver reductions in polysiloxane levels without diminution in sealing and/or waterproofing effectiveness.
    Type: Application
    Filed: February 4, 2009
    Publication date: August 5, 2010
    Applicant: HYCRETE, INC.
    Inventors: Shayne Veramallay, David C. Darwin
  • Vapor barrier for porous structures and system
    Patent number: 7670415
    Abstract: Systems and methods for enhanced moisture vapor barrier performance for concrete-containing materials and surfaces are disclosed. Treatment modalities that include addition of the disclosed materials, compositions and systems to pre- and post-construction concrete-containing materials and surfaces are provided. Moisture vapor barrier properties are effected over an extended period of time as compared to control systems. The disclosed compositions and systems also yield reductions in the rate and/or impact of corrosion are achieved for concrete-containing structures and surfaces and, despite the water soluble properties of the compositions and systems, the treatments are effective in delivering an advantageous level of liquid moisture resistance to the treated concrete-containing structure and/or surface. The composition is synthesized from a feedstock that includes C9 to C16 branched hydrocarbons of varying structures.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: March 2, 2010
    Assignee: Hycrete, Inc.
    Inventors: David Rosenberg, David C. Darwin, John de Mars, Eugene B. Humphrey, Todd B. Humphrey, legal representative, Michael S. Rhodes, Philip S. Rhodes, legal representative, Philip S. Rhodes, James R. Humphrey, Leonid Izrailev, John Wojakowski, Jason Tuerack
  • Cement admixture product having improved rheological properties and process of forming same
    Patent number: 5633298
    Abstract: The present invention is directed to an imidized polycarboxylic acid polymer useful as a cement admixture, to improved cement compositions containing said polymer and to a process of forming the same.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: May 27, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ahmad Arfaei, David C. Darwin, Ellis M. Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo
  • Cement and cement composition having improved rheological properties
    Patent number: 5583183
    Abstract: An improved hydraulic cement and resultant hydraulic cement composition having an imidized acrylic polymer uniformly distributed therein.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: December 10, 1996
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David C. Darwin, Ellis M. Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo
  • Cement and cement composition having improved rheological properties
    Patent number: 5393343
    Abstract: An improved hydraulic cement and resultant hydraulic cement composition having an imidized acrylic polymer uniformly distributed therein.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: February 28, 1995
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David C. Darwin, Ellis M. Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo