Patents by Inventor Seetha Eswarakrishnan

Seetha Eswarakrishnan 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).

  • Method for the preparation of alpha-chlorinated chloroformates
    Patent number: 5712407
    Abstract: Novel catalysts for the synthesis of a alpha-chlorinated chloroformate from an aldehyde and phosgene are described. The catalysts include alkyl substituted guanidines, hexasubstituted guanidinium chlorides, substituted biguanidinium chloride, phenyldialkyliminiumtetraalkylguanidinium chloride, dialkylimidazolinium tetraalkylguanidinium chloride, phenyltetraalkylamidinium chloride and N,N-dialkyl-N'-alkylpyrrolidinium chloride.
    Type: Grant
    Filed: January 14, 1997
    Date of Patent: January 27, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Charles B. Kreutzberger, Seetha Eswarakrishnan, Suresh B. Damle
  • Particulate ammonium phosphate of small size
    Patent number: 5356983
    Abstract: Small particles of ammonium dihydrogen phosphate, diammonium hydrogen phosphate, or a mixture thereof provide a higher Limiting Oxygen Index ("LOI") to polyolefin compositions containing the small particles than do larger particles of the same substance. In many instances, improvement in one or more other properties, such as for example, processability, appearance, UL-94 rating, tensile strength, tensile modulus, and/or elongation at break is also obtained.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: October 18, 1994
    Assignee: PPG Industries, Inc.
    Inventors: Bhima R. Vijayendran, Seetha Eswarakrishnan, Carol L. Knox
  • Intumescent flame retardant composition
    Patent number: 5185103
    Abstract: The water resistance of intumescent compositions is improved if the composition comprises polyol (alkyl carbonate).
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: February 9, 1993
    Assignee: PPG Industries, Inc.
    Inventors: Seetha Eswarakrishnan, Carol L. Knox, Suresh B. Damle
  • Intumescent flame retardant composition
    Patent number: 5130349
    Abstract: The water resistance of intumescent compositions is improved if the composition comprises at least one organotin derivative of a polyol. Organotin derivatives of polyols can be produced by reacting polyol with dialkyltin oxide or with dialkyltin dialkoxide.
    Type: Grant
    Filed: November 7, 1991
    Date of Patent: July 14, 1992
    Assignee: PPG Industries, Inc.
    Inventors: Seetha Eswarakrishnan, Carol L. Knox, Suresh B. Damle