Patents by Inventor Haridoss Sarma

Haridoss Sarma 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 resistant electrical insulation compositions
    Patent number: 5719218
    Abstract: An electrically insulating cross-linked polyethylene composition for use in high voltage electrical cables, said cross-linked polyethylene being obtained by cross-linking a composition consisting essentially of 98% w/w of a low density, peroxide cross-linkable polyethylene, 1-2% w/w of a terpolymer of ethylene, vinyl acetate and vinyl alcohol and at least 0.15% w/w of a sterically hindered amine stabiliser of said composition; said terpolymer being obtained from about 40-45% hydrolysis of an ethylene-vinyl acetate copolymer having a 20-30% w/w vinyl acetate content; and wherein said polyethylene and said terpolymer have substantially the same melt index. The cross-linked polyethylene compositions have improved resistance to moisture induced degradation.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: February 17, 1998
    Assignee: AT Plastics Inc.
    Inventor: Haridoss Sarma
  • Water tree resistant, moisture curable insulation composition for power cables
    Patent number: 5492760
    Abstract: A cross-linkable polymer composition containing a cross-linkable polymer having at least one hydrolysable silane group, a silanol condensation catalyst and a polybutadiene. The composition provides a cross-linked polymer having good water tree resistance properties, for use as insulation in electrical cables.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: February 20, 1996
    Assignee: AT Plastics Inc.
    Inventors: Haridoss Sarma, Alexander Shaikevitch