Patents by Inventor Kenneth E. Harwell

Kenneth E. Harwell 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).

  • Expendable infrared source and method therefor
    Patent number: 4452039
    Abstract: An IR source and method for generating IR radiation whereby a propellant is urned in a first chamber to produce a product gas which is exited through a critical exit, is accelerated to a supersonic velocity by expanding into a second chamber, is passed through a standing shock wave in the chamber to reduce the gas velocity to a subsonic level, is exited through radial orifices into a larger third chamber where the gas is mixed to obtain a substantial uniformity in temperature and specie, is accelerated by expansion to a chosen subsonic velocity, and is exhausted to the atmosphere.
    Type: Grant
    Filed: July 6, 1983
    Date of Patent: June 5, 1984
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Harry L. Hodgkins, John K. Reingruber, Kenneth E. Harwell
  • Process for the preparation of methacrylamide from methylmethacrylate
    Patent number: 4365092
    Abstract: This invention relates to an improved process for the preparation of methacrylamide by the reaction of methylmethacrylate with a molar excess of aqueous ammonium hydroxide at or near ambient temperatures to provide a high purity and yield of methacrylamide reaction product that is compatible in the preparation of isocyanate resins.
    Type: Grant
    Filed: July 13, 1978
    Date of Patent: December 21, 1982
    Assignee: Cook Paint and Varnish Company
    Inventor: Kenneth E. Harwell