Patents by Inventor Randall C. May

Randall C. May 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).

  • Leaching system conduit
    Patent number: 4759661
    Abstract: A thermoplastic device for leaching sewage system effluent into the earth has the shape of an inverted trough. Its sidewalls have slot shaped perforations; above each slot is a lip; beneath each slot is one or more protuberances, preferably rectanguloid in shape. The combination of lips and protuberances prevent compaction of the earth against the sidewalls when the devices are buried without the use of stone fill. They permit the formation of a good biocrust layer and facilitate the exfiltration of liquid into the earth.
    Type: Grant
    Filed: February 27, 1987
    Date of Patent: July 26, 1988
    Assignee: Infiltrator Systems Inc
    Inventors: James M. Nichols, Randall C. May