Patents by Inventor John F. Davidson

John F. Davidson 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: 4197063
    Abstract: A method of spinning fibres from a liquid, particularly a liquid urea formaldehyde resin, which comprises the step of supplying the liquid to at least one rotating annular reservoir having an outwardly extending upper and/or lower weir, and causing the liquid to flow outwardly over the said weir(s) and to be spun outwardly therefrom in the form of fibres by centrifugal force.
    Type: Grant
    Filed: July 28, 1978
    Date of Patent: April 8, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventor: John F. Davidson
  • Patent number: 4171249
    Abstract: An electrochemical cell is disclosed which includes a particulate electrode and a current conductor for feeding current to the particles of the particulate electrode, and means for flowing a fluid medium upwardly through the said particulate electrode, wherein a wall which forms part of a compartment defining the area occupied by the particulate electrode is provided with stabilizing means positioned so as to provide generally unidirectional flow channels which, when the electrochemical cell is in use, encourage vertical flow, and discourage bulk lateral movement, of said particles in the region of the said wall.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: October 16, 1979
    Assignee: Parel Societe Anonyme
    Inventors: Alan F. R. Newton, Kendrick P. Haines, David Harrison, John F. Davidson