Patents by Inventor Srimannarayana Kakarala

Srimannarayana Kakarala 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: 6515074
    Abstract: Flexible thermoplastic polymer alloy compositions and process for preparing same are disclosed. The composition comprises a blend of about 20 to about 40 weight percent (hereinafter “wt. %”) polypropylene; about 20 to about 50 wt. % uncrosslinked ethylene copolymer; about 2 to about 15 wt. % functionalized polymers, which functionalized polymers typically include maleated polypropylene; and about 1 to about 10 wt. % amines, which amines typically include long chain amines. Processes for mixing the compositions are also included.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: February 4, 2003
    Assignee: Delphi Technologies, Inc.
    Inventors: Srimannarayana Kakarala, Dean Madden Bayer, Suresh Deepchand Shah, Jason Bruce Clock
  • Publication number: 20030017329
    Abstract: A multi layer thermoplastic polymer alloy is provided. The multi layer alloy includes a skin of thermoplastic polymer alloy having non-polar segments and a tie-layer having non-polar segments and polar functional groups. The non-polar segments of the tie-layer are bondable with the non-polar segments of the thermoplastic polymer alloy skin. Similarly, the polar functional groups of the tie-layer are bondable or reactable with a surface layer.
    Type: Application
    Filed: July 23, 2001
    Publication date: January 23, 2003
    Inventors: Suresh D. Shah, Nicole M. Mahmood, Srimannarayana Kakarala
  • Publication number: 20020137847
    Abstract: Flexible thermoplastic polymer alloy compositions and process for preparing same are disclosed. The composition comprises a blend of about 20 to about 40 weight percent (hereinafter “wt. %”) polypropylene; about 20 to about 50 wt. % uncrosslinked ethylene copolymer; about 2 to about 15 wt. % functionalized polymers, which functionalized polymers typically include maleated polypropylene; and about 1 to about 10 wt. % amines, which amines typically include long chain amines. Processes for mixing the compositions are also included.
    Type: Application
    Filed: January 22, 2001
    Publication date: September 26, 2002
    Inventors: Srimannarayana Kakarala, Dean Madden Bayer, Suresh Deepchand Shah, Jason Bruce Clock
  • Patent number: 6153680
    Abstract: Thermoplastic polymer alloy compositions and a process for preparing the compositions are provided comprising a blend of polypropylene, uncrosslinked ethylene copolymer, ionomeric copolymer of ethylene and .alpha.,.beta.-unsaturated C.sub.3 -C.sub.8 carboxylic acid, crosslinking agent, and silicone elastomer. The compositions may further comprise particulate filler, color concentrate and/or coloring pigment. The compositions are particularly useful for forming interior skin sheets for applications where low gloss and high scuff resistance are desired without the need for painting. A one step process for preparing moldable sheets from the thermoplastic polymer alloy compositions by in-line compounding and reactive extrusion is also provided which eliminates separate compounding and pelletizing processing steps as precursors to the sheet extrusion process.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: November 28, 2000
    Assignee: Delphi Technologies, Inc.
    Inventors: Suresh Deepchand Shah, Srimannarayana Kakarala, Jeanne E. Schneider