Patents by Inventor John S. McLeod

John S. McLeod 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).

  • Polyurethane foam body with alkaline substance suspended therein for protecting pipe joints of small-diameter pipes
    Patent number: 4153261
    Abstract: A polyurethane foam body which has an alkaline substance suspended therein is provided with a slanted slit so that when the steel bell ring of a pipe telescopingly receives the steel spigot ring of another pipe the polyurethane foam body is compressed such that the resilient forces thereof do not cause the pipes to separate when united to form a joint.
    Type: Grant
    Filed: April 25, 1977
    Date of Patent: May 8, 1979
    Assignee: Interpace Corporation
    Inventor: John S. McLeod