Patents by Inventor Trikur Ramanarayanan

Trikur Ramanarayanan 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).

  • Corrosion resistant article and method of manufacture
    Patent number: 4820591
    Abstract: A corrosion resistant article comprising a refractory metal having a sulfide coating of said refractory metal formed thereon and a method for producing the same by forming on a refractory metal substrate a sulfide coating of said refractory metal. The corrosion resistant article may be provided in a composite comprising also a metal substrate.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: April 11, 1989
    Assignee: Exxon Research and Engineering Company
    Inventor: Trikur A. Ramanarayanan
  • Method for inhibiting corrosion of iron-containing alloy articles in sulfur-containing media
    Patent number: 4763729
    Abstract: Corrosion of iron-containing alloy articles is inhibited by forming on the articles a corrosion resistant layer containing atoms of a refractory metal.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: August 16, 1988
    Assignee: Exxon Research and Engineering Company
    Inventor: Trikur A. Ramanarayanan
  • Alumina-yttria mixed oxides in dispersion strengthened high temperature alloy powders
    Patent number: 4427447
    Abstract: Disclosed are metal powders mixtures which can be mechanically alloyed into oxide dispersion strengthened high temperature alloys. The powder mixtures contain from 0 to 30 wt. % chromium, about 0 to 3 wt. % titanium, about 0.3 wt. % to 10 wt. % aluminum, and from about 0.3 wt. % to 10 wt. % particles of one or more alumina-yttria mixed- oxides selected from the group consisting of Al.sub.2 O.sub.3.2Y.sub.2 O.sub.3, Al.sub.2 O.sub.3.Y.sub.2 O.sub.3, and 5Al.sub.2 O.sub.3.3Y.sub.2 O.sub.3.
    Type: Grant
    Filed: March 31, 1982
    Date of Patent: January 24, 1984
    Assignee: Exxon Research and Engineering Co.
    Inventors: Trikur A. Ramanarayanan, Ruzica Petkovic-Luton, Raghavan Ayer
  • Alumina-yttria mixed oxides in dispersion strengthened high temperature alloys
    Patent number: 4402746
    Abstract: Disclosed are oxide dispersion strengthened high temperature alloy compositions which contain as the dispersoid one or more alumina-yttria mixed-oxides selected from the group consisting of Al.sub.2 O.sub.3.2Y.sub.2 O.sub.3, Al.sub.2 O.sub.3.Y.sub.2 O.sub.3, and 5Al.sub.2 O.sub.3.3Y.sub.2 O.sub.3.
    Type: Grant
    Filed: March 31, 1982
    Date of Patent: September 6, 1983
    Assignee: Exxon Research and Engineering Co.
    Inventors: Trikur A. Ramanarayanan, Ruzica Petkovic-Luton, Raghavan Ayer