Patents by Inventor Ambrose C. Boham

Ambrose C. Boham 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).

  • Extruders and injection moulding machines
    Patent number: 4013276
    Abstract: A screw-housing for an extruder or injection moulding machine, having a longitudinal bore on the internal surface of which is defined grooving, preferably in the form of a number of equidistantly spaced grooves, extending longitudinally throughout substantially the whole length of the housing or alternatively throughout a major portion of the length of the housing downstream of the feed zone thereof.
    Type: Grant
    Filed: March 19, 1975
    Date of Patent: March 22, 1977
    Assignee: British Industrial Plastics Limited
    Inventors: Ambrose C. Boham, John C. Davies, Brian J. Kendall-Smith