Patents by Inventor Lyall C. Hadden

Lyall C. Hadden 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).

  • Sewage treatment and recycling system
    Patent number: 3933641
    Abstract: A sewage treatment and recycling system is disclosed wherein effluent is initially treated in a septic tank and then flows over a perforated splash pan to be distributed evenly over a removable filter. The filtered effluent then passes through a second filter and into a holding tank from where it is pumped to a water tank and chlorinated before being sprayed over the land surface or used for other purposes.
    Type: Grant
    Filed: March 4, 1974
    Date of Patent: January 20, 1976
    Assignee: Environs Engineering Enterprises, Inc.
    Inventors: Lyall C. Hadden, Charles T. Benjamin