Patents by Inventor David F. Myers

David F. Myers 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).

  • Low shrinkage cement composition
    Patent number: 5326396
    Abstract: The present invention is directed to a cement admixture and the resultant cement composition capable of inhibiting drying shrinkage and crack formation resulting therefrom.
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: July 5, 1994
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Baha E. I. Abdelrazig, Ellis M. Gartner, David F. Myers
  • Processing additive for high-pressure roll press process of forming finish grind cement
    Patent number: 5203512
    Abstract: An improved high-pressure roll press process for forming finish ground cement is disclosed and is achieved by treating the material entering the roll press with a small amount of a hydroxyl or alkoxyl compound selected from lignin, phenol or monopropylene glycol or mixtures thereof.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: April 20, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Chiara F. Ferraris, Ellis M. Gartner, David F. Myers
  • Air-detrainer for hydraulic cement compositions
    Patent number: 5156679
    Abstract: A hydraulic cement admixture capable of air detrainment to structures formed therefrom comprising water-soluble alkylated alkanolamine salts.
    Type: Grant
    Filed: August 12, 1991
    Date of Patent: October 20, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ellis M. Gartner, David F. Myers
  • Strength enhancing additive for certain portland cements
    Patent number: 5084103
    Abstract: This invention relates to a method of producing enhanced strength portland cements. Under the process of this invention, certain portland cements, in particular those containing at least 4% C.sub.4 AF and up to 0.2% of a strength enhancing additive comprising triisopropanolamine, exhibit a marked increase in 7 and 28 day compressive strength. The triisopropanolamine strength enhancing additive may be admixed with cement powder or may be interground as a grinding aid with cement clinker during finish milling.
    Type: Grant
    Filed: August 2, 1990
    Date of Patent: January 28, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David F. Myers, Ellis M. Gartner
  • Processing additives for blended cements
    Patent number: 5017234
    Abstract: This invention relates to a method of enhancing the later age strength of certain blended cements. Under the process of this invention, certain blended cements, in particular those made from cement clinkers containing at least 4% C.sub.4 AF, when mixed with up to 0.2% of a higher trialkanolamine exhibit a marked increase in 7 and 28-day compressive strengths. The blended cements of this invention contain between 5 and 80% fillers or clinker substitutes. The higher trialkanolamine strength enhancing additive may be admixed with the cement powder or may be interground with the cement clinker during finish milling.
    Type: Grant
    Filed: July 13, 1990
    Date of Patent: May 21, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ellis M. Gartner, David F. Myers, James M. Gaidis
  • Strength enhancing additive for certain portland cements
    Patent number: 4990190
    Abstract: This invention relates to a method of producing enhanced strength portland cements. Under the process of this invention, certain portland cements, in particular those containing at least 4% C.sub.4 AF and up to 0.2% of a strength enhancing additive comprising triisopropanolamine, exhibit a marked increase in 7 and 28 day compressive strength. The triisopropanolamine strength enhancing additive may be admixed with cement powder or may be interground as a grinding aid with cement clinkder during finish milling.
    Type: Grant
    Filed: October 6, 1989
    Date of Patent: February 5, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David F. Myers, Ellis M. Gartner
  • Processing additives for blended cements
    Patent number: 4943323
    Abstract: This invention relates to a method of enhancing the later age strength of certain blended cements. Under the process of this invention, certain blended cements, in particular those made from cement clinkers containing at least 4% C.sub.4 AF, when mixed with up to 0.2% triisopropanolamine exhibit a marked increase in 7 and 28-day compressive strengths. The blended cements of this invention contain between 5 and 60% fillers or clinker substitutes. The triisopropanolamine strength enhancing additive may be admixed with the cement powder or may be interground with the cement clinker during finish milling.
    Type: Grant
    Filed: October 6, 1989
    Date of Patent: July 24, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ellis M. Gartner, David F. Myers, James M. Gaidis