Patents by Inventor Vankatarao K. Pai

Vankatarao K. Pai 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).

  • Process for the preparation of 1,3,5-triazine carbamates from amino-1,3,5-triazines and organic carbonates
    Patent number: 6506898
    Abstract: Provided is a process for preparing an at least bis-carbamate functional 1,3,5-triazine by contacting an at least diamino-1,3,5-triazine, an acyclic organic carbonate and a base, as well as certain novel compositions producible thereby. Also provided are substantially halogen contamination free crosslinker compositions comprising the products obtainable by the process, and curable compositions based upon these crosslinkers.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: January 14, 2003
    Assignee: Cytec Technology Corp.
    Inventors: Lawrence A. Flood, Ram B. Gupta, Revathi Iyengar, David A. Ley, Vankatarao K. Pai
  • Carbamate functional 1,3,5-triazines
    Patent number: 6063922
    Abstract: Provided is a novel carbamate functional 1,3,5-triazine of the general formula ##STR1## wherein Z' is selected from the group consisting of hydrogen, hydrocarbyl, and a group represented by the formula NHQ',each Q' is independently selected from the group consisting of a hydrocarbyl, a hydrocarbyloxy hydrocarbyl and a group represented by the formula COOY, with the proviso that at least two of the Q' groups are COOY, andeach Y is independently selected from the group consisting of a hydrocarbyl group and a hydrocarbyloxy hydrocarbyl ether group, with the proviso that at least one Y group is a hydrocarbyloxy hydrocarbyl ether group. These carbamate functional 1,3,5-triazines find use, for example, as crosslinkers or reactive modifiers in curable compositions.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: May 16, 2000
    Assignee: Cytec Technology Corp.
    Inventors: Lawrence A. Flood, Ram B. Gupta, Revathi Iyengar, David A. Ley, Vankatarao K. Pai
  • Process for the preparation of 1,3,5-triazine carbamates from amino 1,3,5-triazines and organic carbonates
    Patent number: 5792866
    Abstract: Provided is a process for preparing an at least bis-carbamate functional 1,3,5-triazine by contacting an at least diamino-1,3,5-triazine, an acyclic organic carbonate and a base, as well as certain novel compositions producible thereby. Also provided are substantially halogen contamination free crosslinker compositions comprising the products obtainable by the process, and curable compositions based upon these crosslinkers.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: August 11, 1998
    Assignee: Cytec Technology Corporation
    Inventors: Lawrence A. Flood, Ram B. Gupta, Revathi Iyengar, David A. Ley, Vankatarao K. Pai
  • Process for the preparation of 1,3,5-triazine carbamates from amino-1,3,5-triazines and organic carbonates
    Patent number: 5705641
    Abstract: Provided is a process for preparing an at least bis-carbamate functional 1,3,5-triazine by contacting an at least diamino-1,3,5-triazine, an acyclic organic carbonate and a base, as well as certain novel compositions producible thereby. Also provided are substantially halogen contamination free crosslinker compositions comprising the products obtainable by the process, and curable compositions based upon these crosslinkers.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: January 6, 1998
    Assignee: Cytec Technology Corp.
    Inventors: Lawrence A. Flood, Ram B. Gupta, Revathi Iyengar, David A. Ley, Vankatarao K. Pai