Patents by Inventor Rajnikant Shah

Rajnikant Shah 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).

  • Rosin-fatty acid vinylic polymers as sizing compositions
    Patent number: 6172149
    Abstract: This invention relates to novel rosin-fatty acid vinylic polymer compositions and the process for preparing them. In particular, the invention relates to novel rosin-fatty acid vinylic polymer compositions which exhibit properties that make them useful as surface sizing compositions for cellulosic materials.
    Type: Grant
    Filed: March 7, 2000
    Date of Patent: January 9, 2001
    Assignee: Westvaco Corporation
    Inventors: Rajnikant Shah, Stanley C. Adams
  • Epoxy-urethane imine and hydroxyl primer
    Patent number: 6080817
    Abstract: The present invention is directed to novel coating compositions. In particular, the present invention is directed to polyuroxy low VOC coating compositions. The compositions may be applied wet on wet with a suitable basecoat/clearcoat or single-stage topcoat composition.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: June 27, 2000
    Assignee: BASF Corporation
    Inventors: Larry E. Thieben, Patrick J. Mormile, Bradley M. Richards, Rajnikant Shah
  • Method for repair welding aluminum-lithium alloys
    Patent number: 6003755
    Abstract: Aluminum-lithium alloy sheets which are welded together are examined to identify regions requiring repair. A grid is applied to the sheet about the region requiring repair, and the region to be repaired is ground out and rewelded. Residual stresses are relieved by planishing yes to cause localized plastic deformation in the repaired region. The grid is used as a guide to restoring the original dimensions of the sheet in a manner which tends to reduce in-plane shrinkage. The reduced in-plane shrinkage in turn tends to reduce undesired tensile residual stresses. The planishing also tends to work-harden the weld filler.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: December 21, 1999
    Assignee: Lockheed Martin Corp.
    Inventors: Sandeep Rajnikant Shah, Lynda Louise Johnston, Julian Ervin Bynum, Samuel Dwight Clark, Benny Floyd Graham, Ronald Brian Renfroe, Patrick Ryan Rogers
  • Polyuroxy sealer prepared from epoxy resin, aldimine or ketimine and polyisocyanate
    Patent number: 5990243
    Abstract: A coating composition useful as a sealer comprises an epoxy resin, an aldimine or ketimine, a polyisocyanate hardener and a hydroxyl containing compound such as a polyester or acrylic polyol.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: November 23, 1999
    Assignee: BASF Corporation
    Inventors: Patrick J. Mormile, Rajnikant Shah, Larry E. Thieben