Patents by Inventor A. Keith Campbell

A. Keith Campbell 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: 20210284848
    Abstract: The invention involves a material that exhibits both thermal insulation and temperature resistance properties. The high temperature material is a metallic silicate bonded with a ceramic. The metallic silicate material mixes and applies with paint or paint base and provides temperature resistant color, as well as heat insulation to the object being coated. The metallic silicate also provides corrosion resistance to the base material. The metallic silicate preferably includes naturally occurring stone having a content of silicate and metal including metal ions. The silicate is converted to a liquid and bonded with a metal ion and, in some embodiments, a ceramic within a basic paint base to create the metallic silicate compound. The metallic silicate compound can be combined with or formed within a paint base and applied as a film or paint coating having high temperature resistance, heat reflectivity, and corrosion resistance.
    Type: Application
    Filed: March 16, 2021
    Publication date: September 16, 2021
    Inventor: A. Keith Campbell
  • Patent number: 10519399
    Abstract: A scented candle is provided. The candle has a body made of a flammable material and a wick. The body of the candle is provided with one or more bores adapted for receiving a respective scent element therein as selected by a user.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: December 31, 2019
    Inventors: Lucy M. Campbell, A. Keith Campbell
  • Publication number: 20180312778
    Abstract: A scented candle is provided. The candle has a body made of a flammable material and a wick. The body of the candle is provided with one or more bores adapted for receiving a respective scent element therein as selected by a user.
    Type: Application
    Filed: May 4, 2018
    Publication date: November 1, 2018
    Inventors: Lucy M. Campbell, A. Keith Campbell
  • Patent number: 6073536
    Abstract: An automotive hydraulic system having a power steering unit of a vehicle connected in parallel with an externally mounted, hydraulic-cylinder-powered accessory, such as a liftgate, snow plow or dump bed. The vehicle's power steering pump supplies the required hydraulic fluid to the power steering unit and to a cylinder in the accessory, simultaneously in the preferred embodiment and alternately in another. A preferred valve assembly is disclosed which includes a priority flow control valve and a three-position, four-way accessory control valve mounted together in a manifold designed for connection to the vehicle's power steering pump, power steering unit, and hydraulic fluid reservoir, and to a double-acting hydraulic cylinder in the accessory.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: June 13, 2000
    Inventor: A. Keith Campbell