Patents by Inventor Ellis Martin Gartner

Ellis Martin Gartner 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 early-strength-enhancing admixture for precast hydraulic cement and compositions containing same
    Patent number: 5840114
    Abstract: A high early strength admixture for precast hydraulic cement comprises a calcium salt and a copolymer having a carbon-containing backbone to which are attached cement-anchoring members, such as carboxyl groups, and to which are also attached oxyalkylene pendant groups by linkages selected from the group consisting of amide and imide members. The copolymers used are preferably formed by reacting an acrylic polymer with ammonia or an alkoxylated amine. The calcium salt, preferably calcium nitrite, and the copolymer can be added simultaneously as one admixture, or separately. The invention relates also to methods for enhancing high early strength in concrete, cement, masonry, and mortar mixtures generally, and to precast concrete particarly, and also pertains to such hydraulic mixtures containing the calcium salt and copolymer.
    Type: Grant
    Filed: May 17, 1996
    Date of Patent: November 24, 1998
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ara Avedis Jeknavorian, Ahmad Arfaei, Neal Steven Berke, David Charles Darwin, Ellis Martin Gartner, Leslie Ann Jardine, James Franklin Lambert, Lawrence Reeder Roberts
  • Cement and cement composition having improved rheological properties
    Patent number: 5753744
    Abstract: An improved hydraulic cement and resultant hydraulic cement composition which has an alkyl terminated alkoxy amine derivative of maleic acid based polymer or copolymer uniformly distributed therein.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: May 19, 1998
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: David Charles Darwin, Ellis Martin Gartner, Ahmad Arfaei, Xiaojia Zhang
  • Cement admixture product having improved rheological properties and process of forming same
    Patent number: 5728207
    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: July 3, 1996
    Date of Patent: March 17, 1998
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Ahmad Arfaei, David Charles Darwin, Ellis Martin Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence Lu Kuo
  • Cement admixture product
    Patent number: 5725657
    Abstract: The present invention is directed to a polyoxyalkylene ammonium salt of an imidized polycarboxylic acid polymer cement admixture, storage stable aqueous solutions of said polymer, and to improved cement compositions containing said polymer.
    Type: Grant
    Filed: March 24, 1996
    Date of Patent: March 10, 1998
    Inventors: David Charles Darwin, Ellis Martin Gartner
  • Cement admixture product
    Patent number: 5665158
    Abstract: The present invention is directed to a polyoxyalkylene ammonium salt of an imidized polycarboxylic acid polymer cement admixture, storage stable aqueous solutions of said polymer, and to improved cement compositions containing said polymer.
    Type: Grant
    Filed: July 24, 1995
    Date of Patent: September 9, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David Charles Darwin, Ellis Martin Gartner
  • Control of expansion in concrete due to alkali silica reaction
    Patent number: 5656075
    Abstract: A cement composition including spodumene which has been heated to at least 1000.degree. C. which is capable of inhibiting expansion of the concrete due to the alkali-silica reaction. The present invention also provides a method of reducing expansion in cement compositions.
    Type: Grant
    Filed: May 10, 1995
    Date of Patent: August 12, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: James Michael Gaidis, Ellis Martin Gartner
  • Cement admixture product having improved rheological properties and process of forming same
    Patent number: 5643978
    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: July 1, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David Charles Darwin, Ellis Martin Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence Lu Kuo