Patents by Inventor Oliver F. Hooper

Oliver F. Hooper 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).

  • Drain collar
    Patent number: 5099887
    Abstract: A collar for a drain pipe riser is provided for maintaining an annular space about the periphery of the riser during the pouring of a floor about the riser. The collar includes inner and outer sleeves separated by a plurality of knock-out webs. The inner sleeve is adapted to fit over the riser while the outer sleeve insures an annular space will be maintained about the riser during pouring of the floor. The webs can then be knocked out, and the inner sleeve and webs removed.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: March 31, 1992
    Inventor: Oliver F. Hooper