Patents by Inventor Pramod Chakravarthy

Pramod Chakravarthy 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).

  • Surface modification of medical implants
    Patent number: 6464889
    Abstract: An irregularly etched metallic medical implant device is provided having random non-uniform relief patterns on the surface ranging from about 0.3 &mgr;m to less than about 20 &mgr;m in depth. The random, irregular surface as defined by the etch micromorphology and respective dimensional properties is sobtained by exposing a surface to a reactive plasma in a chamber wherein said reactive plasma produces a reaction product with the surface to thereby etch the surface, said reaction product or a complex thereof having a vapor pressure lower than a pressure in the chamber; providing a dynamic masking agent during the etching process; and removing the reaction products.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: October 15, 2002
    Assignee: Etex Corporation
    Inventors: Dosuk D. Lee, Atul Nagras, Pramod Chakravarthy, Anthony M. Majahad
  • Surface modification of medical implants
    Patent number: 6033582
    Abstract: An irregularly etched medical implant device is provided having random non-uniform relief patterns on the surface ranging from about 0.3 .mu.m to less than about 20 .mu.m in depth. The random, irregular surface as defined by the etch micromorphology and respective dimensional properties are obtained by exposing a surface to a reactive plasma in a chamber wherein said reactive plasma produces a reaction product with the surface to thereby etch the surface, said reaction product or a complex thereof having a vapor pressure lower than a pressure in the chamber; providing a dynamic masking agent during the etching process; and removing the reaction products.
    Type: Grant
    Filed: January 16, 1998
    Date of Patent: March 7, 2000
    Assignee: Etex Corporation
    Inventors: Dosuk D. Lee, Atul Nagras, Pramod Chakravarthy, Anthony M. Majahad
  • Mixing device
    Patent number: 5980482
    Abstract: A mixer for the mixing of components, comprising a continuous inner surface that is non-retaining to the components, wherein a first portion of the inner surface opposably contacts a second portion of the inner surface during mixing, and a means for supplying a component to the mixer; a kit including the mixer, and methods of using the mixer to prepare compositions.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: November 9, 1999
    Assignee: Etex Corporation
    Inventors: Aliassghar Tofighi, Alfred V. Vasconcellos, Katherine Jacobs, Pramod Chakravarthy
  • Mixing device
    Patent number: 5795330
    Abstract: A mixer for the mixing of a first and a second component, comprising a flexible pouch which contains said first component and which has an inner surface that is non-retaining to the components; means for supplying the second component to the chamber for mixing with the first component; and a neck attached to said pouch.
    Type: Grant
    Filed: October 10, 1996
    Date of Patent: August 18, 1998
    Assignee: Etex Corporation
    Inventors: Aliassghar Tofighi, Alfred V. Vasconcellos, Katherine Jacobs, Pramod Chakravarthy