Patents by Inventor Uma S. Nandi

Uma S. Nandi 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).

  • Patent number: 4778721
    Abstract: Disclosed are improved abrasion-resistant plasma coatings adapted to be coated onto substrates including polymeric substrates, glass, and metal. The method of plasma coating the substrates comprises restricting the monomer to be a silane, disiloxane, silazane, or disilazane which is substituted with at least one alkoxy group per silicon atom wherein the alkoxy group is selected from methoxy groups, ethoxy groups, and mixtures thereof. The plasma coating is applied under plasma coating conditions for a time adequate to form an abrasion-resistant coating having sufficient thickness so as to possess a Taber abrasion resistance of less than 10% haze development after 100 cycles. Abrasion resistance of some disclosed coatings is less than about 5% development after 1,000 cycles.
    Type: Grant
    Filed: July 9, 1986
    Date of Patent: October 18, 1988
    Assignee: Battelle Memorial Institute
    Inventors: Francis A. Sliemers, Uma S. Nandi, Philip C. Behrer, George P. Nance
  • Patent number: 4426504
    Abstract: Disclosed is an acrylic curable composition of improved flexibility that cures rapidly at room temperature in the presence of acrylic catalysts. The composition comprises between about 70% and 95% by weight dicyclopentenyl oxyethyl methacrylate and between about 5% and 30% of a linear polyalkylene glycol diacrylate or dimethacrylate cross-linking agent. Excellent flexibility and strength are achieved by use of the named cross-linking agents within the critical range set forth.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: January 17, 1984
    Assignee: Battelle Development Corporation
    Inventor: Uma S. Nandi