Patents by Inventor R. B. Gupta

R. B. Gupta 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).

  • Crosslinked film of tris-pyrrolidonyl triazine and polyfunctional active H-containing material
    Patent number: 6107369
    Abstract: A process for preparing a tris-lactam crosslinking agent, tris-pyrrolidonyl triazine, from N,N',N"-tris(4-chlorobutyryl)melamine by treatment of the chlorobutyryl derivative with a base such as sodium or potassium carbonate to effect intramolecular cyclization to the tris-lactam. A curable composition comprised of tris-pyrrolidonyl triazine as the crosslinking agent and a hydroxyfunctional or aminofunctinoal material as a resin. Thick films with no pinholes are prepared from the curable compositions using powder coating techniques.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: August 22, 2000
    Assignee: Cytec Technology Corp.
    Inventors: R. B. Gupta, Robert G. Lees
  • Process for preparing tris-pyrrolidonyl triazine crosslinker
    Patent number: 5496944
    Abstract: A process for preparing a tris-lactam crosslinking agent, tris-pyrrolidonyl triazine, from N,N',N"-tris(4-chlorobutyryl)melamine by treatment of the chlorobutyryl derivative with a base such as sodium or potassium carbonate to effect intramolecular cyclization to the tris-lactam. A curable composition comprises tris-pyrrolidonyl triazine as the crosslinking agent and a hydroxyfunctional or aminofunctinoal material as a resin. Thick films with no pinholes are prepared from the curable compositions using powder coating techniques.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: March 5, 1996
    Assignee: Cytec Technology Corp.
    Inventors: R. B. Gupta, Robert G. Lees