Patents by Inventor Joseph Devasia Ponmankal

Joseph Devasia Ponmankal 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).

  • Water-dispersible polymer and coating composition containing the same
    Patent number: 5922817
    Abstract: A water-dispersible polymer and a coating composition containing the water-dispersible polymer are disclosed. The water-dispersible polymer is prepared from: (a) an epoxy compound having about two epoxy groups, such as an epoxy resin, (b) a linking compound having (i) conjugated carbon--carbon double bonds or a carbon--carbon triple bond and (ii) a moiety capable of reacting with an epoxy group, such as sorbic acid, and (c) acrylic monomers, at least a portion of which are capable of rendering the polymer water dispersible, such as acrylic acid, wherein the epoxy portion (a) of the polymer is covalently linked to the polymerized acrylic portion (c) by linking compound (b). The coating composition contains the water-dispersible polymer, a fugitive base to solubilize the polymer, a curing agent, and a carrier containing water.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: July 13, 1999
    Assignee: The Dexter Corporation
    Inventors: Walter R. Pedersen, Joseph Devasia Ponmankal
  • Water-dispersible polymer and coating composition containing the same
    Patent number: 5869552
    Abstract: A water-dispersible polymer and a coating composition containing the water-dispersible polymer are disclosed. The water-dispersible polymer is prepared from: (a) an epoxy compound having about two epoxy groups, such as an epoxy resin, (b) a linking compound having (i) conjugated carbon-carbon double bonds or a carbon-carbon triple bond and (ii) a moiety capable of reacting with an epoxy group, such as sorbic acid, and (c) acrylic monomers, at least a portion of which are capable of rendering the polymer water dispersible, such as acrylic acid, wherein the epoxy portion (a) of the polymer is covalently linked to the polymerized acrylic portion (c) by linking compound (b). The coating composition contains the water-dispersible polymer, a fugitive base to solubilize the polymer, a curing agent, and a carrier containing water.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: February 9, 1999
    Assignee: The Dexter Corporation
    Inventors: Walter R. Pedersen, Joseph Devasia Ponmankal
  • Water-dispersible polymer and coating composition containing the same
    Patent number: 5830952
    Abstract: A water-dispersible polymer and a coating composition containing the water-dispersible polymer are disclosed. The water-dispersible polymer is prepared from: (a) an epoxy compound having about two epoxy groups, such as an epoxy resin, (b) a linking compound having (i) conjugated carbon--carbon double bonds or a carbon--carbon triple bond and (ii) a moiety capable of reacting with an epoxy group, such as sorbic acid, and (c) acrylic monomers, at least a portion of which are capable of rendering the polymer water dispersible, such as acrylic acid, wherein the epoxy portion (a) of the polymer is covalently linked to the polymerized acrylic portion (c) by linking compound (b). The coating composition contains the water-dispersible polymer, a fugitive base to solubilize the polymer, a curing agent, and a carrier containing water.
    Type: Grant
    Filed: February 22, 1996
    Date of Patent: November 3, 1998
    Assignee: The Dexter Corporation
    Inventors: Walter R. Pedersen, Joseph Devasia Ponmankal