Patents by Inventor David A. Slavin

David A. Slavin 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).

  • Publication number: 20240026751
    Abstract: Provided is an inner sleeve, a downhole tool, and a method for cementing. The inner sleeve, in at least one aspect, includes a tubular having an inside tubular surface and an outside tubular surface. The inner sleeve, according to this aspect, further includes a collet including two or more collet fingers coupled to one end of the tubular, the collet having an inside collet surface and an outside collet surface, and further wherein the inside collet surface flares outward from the inside tubular surface by an angle (?0) when the collet is in its natural state.
    Type: Application
    Filed: July 21, 2022
    Publication date: January 25, 2024
    Inventors: Lonnie Carl Helms, Maithri Muddasani, Charles David Slavin, Frank Vinicia Acosta Villarreal
  • Patent number: 6051908
    Abstract: A relatively narrow fractional bandwidth saw filter formed on a standard ST cut of quartz. The electrode pattern is modified in order to eliminate distortion. In particular, the overlap pattern is formed with one or less active overlaps per wavelength in those regions of the SAW filter where the weighing function is maximum. A plurality of six finger/.lambda. electrode patterns with two active overlaps per wavelength is also provided.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: April 18, 2000
    Assignee: TRW Inc.
    Inventors: Edward M. Garber, Daniel K. Ko, David A. Slavin
  • Patent number: 5952765
    Abstract: A relatively narrow fractional bandwidth saw filter formed on a standard ST cut of quartz. The electrode pattern is modified in order to eliminate distortion. In particular, the overlap pattern is formed with one or less active overlaps per wavelength in those regions of the SAW filter where the weighing function is maximum. A plurality of six finger/.lambda. electrode patterns with two active overlaps per wavelength is also provided.
    Type: Grant
    Filed: November 26, 1996
    Date of Patent: September 14, 1999
    Assignee: TRW Inc.
    Inventors: Edward M. Garber, Daniel K. Ko, David A. Slavin