Patents by Inventor Marvin Pennell

Marvin Pennell 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).

  • Ceramic-ceramic composite prepregs and methods for their use and preparation
    Patent number: 5395648
    Abstract: Prepregs for producing ceramic-ceramic composite articles are prepared by impregnating a ceramic substrate with a liquid ceramic precursor material. By properly controlling the viscosity of the precursor material and the conditions of application of the precursor to the substrate, a prepreg which can retain the precursor may be obtained. The prepreg is suitable for shaping into a wide variety of geometries, and the ceramic precursor may be transformed into the corresponding ceramic matrix material by curing and conversion steps.
    Type: Grant
    Filed: November 9, 1989
    Date of Patent: March 7, 1995
    Assignee: Kaiser Aerospace and Electronics Corporation
    Inventors: H. O. Davis, Marvin Pennell, Gary Patz
  • Method of making aluminum oxide precursors
    Patent number: 5104636
    Abstract: Aluminum oxide ceramic composite articles having high flexural and tensile strength are produced by introducing a liquid aluminum oxide precursor material into a ceramic reinforcement fabric, curing the precursor material at an elevated temperature, and converting the cured precursor material to an aluminum oxide ceramic by pyrolysis at temperatures which do not result in the degradation of the reinforcement material. Such ceramic composite articles are particularly useful for applications requiring a low dielectric constant and a high mechanical strength.
    Type: Grant
    Filed: January 2, 1991
    Date of Patent: April 14, 1992
    Assignee: Kaiser Aerospace and Electronics Corporation
    Inventors: H. O. Davis, Marvin Pennell
  • Process for forming aluminum oxide ceramic composites
    Patent number: 4983422
    Abstract: Aluminum oxide ceramic composite articles having high flexural and tensile strength are produced by introducing a liquid aluminum oxide precursor material into a ceramic reinforcement fabric, curing the precursor material at an elevated temperature, and converting the cured precursor material to an aluminum oxide ceramic by pyrolysis at temperatures which do not result in the degradation of the reinforcement material. Such ceramic composite articles are particularly useful for applications requiring a low dielectric constant and a high mechanical strength.
    Type: Grant
    Filed: March 11, 1988
    Date of Patent: January 8, 1991
    Assignee: Kaiser Aerotech
    Inventors: H. O. Davis, Marvin Pennell