Patents by Inventor Leziro M. Silva

Leziro M. Silva 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).

  • Utilization of non-woven fabrics in water treatment
    Patent number: 4222877
    Abstract: A filtering method, and a filter, for removing turbidity and color from water, uses as a filtering medium, a blanket of non-woven fabric, particularly a blanket of felted fibers. The blanket is, in use, supported on a gravel bed, slotted ceramic blocks or the like, and can be held and protected by a grating.
    Type: Grant
    Filed: June 14, 1978
    Date of Patent: September 16, 1980
    Inventor: Leziro M. Silva