Patents by Inventor L. Marshall McCullough

L. Marshall McCullough 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).

  • Patent number: 5254226
    Abstract: An easily installed, automatically operated sanitizing direct current, electrolytic cell canister assembly and a method of efficiently providing brominated water for swimming pools and the like, the method including furnishing d.c. power at a constant amperage to the bipolar electrode graphite plate electrolytic cell canister, controlling the flow of electrolyte through the canister, turning the d.c. current on and off to provide d.c. on/off switching, turning the d.c. power off, adjusting the time of the on/off switching so that the current is off for a predetermined selected time in a cycle of about 1 to 60 seconds, and, just prior to reversing the polarity of the electrodes, turning the power off for about five seconds, with separate polarity changing switching to help efficiently clean the graphite plates and keep the bromine atoms from going back to their ionized state and reduce any power surge due to the reversal of the polarity.
    Type: Grant
    Filed: May 5, 1992
    Date of Patent: October 19, 1993
    Assignee: Ad rem Manufacturing, Inc.
    Inventors: Ronald C. Williams, C. Donald Kettle, Earl E. Stebbins, L. Marshall McCullough
  • Patent number: RE36402
    Abstract: An easily installed, automatically operated sanitizing direct current, electrolytic cell canister assembly and a method or efficiently providing brominated water for swimming pools and the like, the method including furnishing d.c. power at a constant amperage to the bipolar electrode graphite plate electrolytic cell canister, controlling the flow of electrolyte through the canister, turning the d.c. current on and off to provide d.c. on/off switching, turning the d.c. power off, adjusting the time of the on/off switching so that the current is off for a predetermined selected time in a cycle of about 1 to 60 seconds, and, just prior to reversing the polarity of the electrodes, turning the power off for about five seconds, with separate polarity changing switching to help efficiently clean the graphite plates and keep the bromine atoms from going back to their ionized state and reduce any power surge due to the reversal of the polarity.
    Type: Grant
    Filed: October 18, 1995
    Date of Patent: November 23, 1999
    Assignee: Ad rem Manufacturing, Inc.
    Inventors: Ronald C. Williams, C. Donald Kettle, Earl E. Stebbins, L. Marshall McCullough