Patents by Inventor Vinodkumar Mehra

Vinodkumar Mehra 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).

  • Process for making laminar articles
    Patent number: 5700412
    Abstract: This invention relates to a process for making laminar articles by blending multicomponent pellets of a heterogeneous blend of a barrier resin, typically a condensation polymer, and a compatibilizer with a polyolefin. The pellets advantageously prevent segregation of the barrier resin and the compatibilizer during processing. This provides uniform, reproducible laminar articles with improved barrier properties and mechanical properties. The articles exhibit good fluid barrier and mechanical properties.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: December 23, 1997
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Vinodkumar Mehra, Robert Benham Fish, Jr.
  • Articles incorporating barrier resins
    Patent number: 5443867
    Abstract: Laminar articles are disclosed comprising a heterogeneous melt of (a) a polyolefin, (b) a barrier resin comprising a blend of a condensation polymer incompatible with the polyolefin such as a polyamide and a phenol-formaldehyde resin, and (c) a compatibilizer. A process for making such laminar articles is also disclosed. Multilayer structures incorporating this barrier resin are also disclosed.
    Type: Grant
    Filed: October 25, 1993
    Date of Patent: August 22, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Vinodkumar Mehra, Edmund A. Flexman, Jr.
  • Multilayer laminates from blow moldable thermoplastic polyamide and polyvinyl alcohol resins
    Patent number: 5209958
    Abstract: Multilayer laminates formed from at least two layers. The first layer being a flexible blow moldable thermoplastic polyamide composition and the second layer being a vinyl alcohol composition. These laminates can withstand high temperatures for extended periods of time, possess low temperature impact strength, and have resistance to permeation of fuel compositions. These laminates are especially suited for fuel tanks for motor vehicles.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: May 11, 1993
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: James D. Katsaros, Vinodkumar Mehra
  • Process for reclaiming polyethylene terephthalate scrap contaminated with chlorine-containing polymer
    Patent number: 4870110
    Abstract: Polyethylene terephthalate scrap material containing on its surface a chlorine-containing polymer such as, for example, polyvinylidene chloride or polyvinyl chloride, can be recovered and reused by melt-blending it with a polymer from a defined class of ethylene copolymers containing an epoxy group, and melt processing the blend in the same manner as virgin polyethylene terephthalate. The recovered and reprocessed polymer material has good physical properties and barrier properties.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: September 26, 1989
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Vinodkumar Mehra, Pallatheri M. Subramanian
  • Process for reclaiming polyethylene terephalate scrap contaminated with chlorine-containing polymer
    Patent number: 4826897
    Abstract: Polyethylene terephthalate scrap material containing on its surface a chlorine-containing polymer such as, for example, polyvinylidene chloride or polyvinyl chloride, can be recovered and reused by melt-blending it with a polymer from a defined class of ethylene copolymers containing an epoxy group, and melt processing the blend in the same manner as virgin polyethylene terephthalate. The recovered and reprocessed polymer material has good physical properties and barrier properties.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: May 2, 1989
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Vinodkumar Mehra, Pallatheri M. Subramanian