Patents by Inventor Kelvin E. Hall

Kelvin E. Hall 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).

  • Waste outlet assembly
    Patent number: 7246386
    Abstract: The present invention relates to a waste outlet assembly, in particular a waste outlet assembly for a urinal of the type commonly found in men's lavatories. There is described an elongate cylindrical insert having an operatively upper end and an operatively lower end and being insertable into the waste outlet of a urinal bowl or trough, which outlet includes a liquid trap, wherein the insert is radially dimensioned to provide a close fit against the walls of the waste outlet; and wherein the insert is longitudinally dimensioned such that, in use, the lower end extends into liquid in the liquid trap. There is also described a urinal including such an insert.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: July 24, 2007
    Assignee: Enviro-Fresh Limited
    Inventor: Kelvin E. Hall
  • Waste outlet assembly
    Publication number: 20040163171
    Abstract: The present invention relates to a waste outlet assembly, in particular a waste outlet assembly for a urinal of the type commonly found in men's lavatories. There is described an elongate cylindrical insert having an operatively upper end and an operatively lower end and being insertable into the waste outlet of a urinal bowl or trough, which outlet includes a liquid trap, wherein the insert is radially dimensioned to provide a close fit against the walls of the waste outlet; and wherein the insert is longitudinally dimensioned such that, in use, the lower end extends into liquid in the liquid trap. There is also described a urinal including such an insert.
    Type: Application
    Filed: February 16, 2004
    Publication date: August 26, 2004
    Inventor: Kelvin E. Hall