Patents by Inventor Pragna Patel

Pragna Patel 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).

  • High-pressure/high-temperature seals between glass fibers and metals, downhole optical feedthroughs containing the same, and methods of preparing such seals
    Publication number: 20060269211
    Abstract: A glass-to-meal seal for use in high temperature and high pressure environments is described. The glass-to-metal seals includes an optical fiber having a metallized portion, the metallized portion having an outer dimension; an object having a high strength, corrosion-resistant alloy, the object having an outer surface and an inner surface defining a bore, the bore having a dimension larger than the outer dimension of the metallized portion of the optical fiber; and a hardened solder material disposed between the metallized portion of the optical fiber and the inner surface of the bore, such that a hermetic seal is provided between the metallized portion of the optical fiber and the inner surface of the bore; wherein the solder includes a substance having a melting temperature greater than about 250° C.
    Type: Application
    Filed: May 30, 2006
    Publication date: November 30, 2006
    Applicant: Greene, Tweed of Delaware, Inc.
    Inventors: Pragna Patel, Trung Nguyen, Charles Burke, George DeNardo