Patents by Inventor Douglas Ian Nicholas

Douglas Ian Nicholas 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).

  • Patent number: 6379541
    Abstract: A pollution control device (10) for removal of litter and sediments from a flowing stream of stormwater or the like, the device including an upwardly inclined flume (11,18) adapted to be disposed adjacent the discharge end of a stormwater outlet (16) with a collection container (12) at the opposite end of the flume, the flume (18) and the container (12) being fabricated from expanded metal mesh screen. During stormwater flow, litter entrained with the stormwater is urged up the inclined path of the flume (18) for collection in the container (12) whereas sediments are screened from the flume (18) and the container (12) through apertures in the expanded metal screen and pass through to a sediment sump (29) disposed beneath the device (10). Stormwater which has been so screened is then permitted to flow further downstream. A method of separating litter and sediments from a flowing stream of stormwater is also claimed.
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: April 30, 2002
    Inventor: Douglas Ian Nicholas