Patents by Inventor Richard Joel Hershman

Richard Joel Hershman 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).

  • Apparatus for controlled delivery of powdered solid materials
    Patent number: 6073818
    Abstract: Apparatus and methods for accurate delivery of relatively small quantities of powdered solid materials. Preferred apparatus comprise: a primary chamber having a lateral surface extending between a first open end and a second open end; a rotating member that is positioned within the primary chamber and extends from a first position within the primary chamber to a second position within the primary chamber; a motor coupled with the rotating member and adapted to effect rotation thereof; a feed chamber having a lateral surface extending between a first open end and a second open end; and an air flow chamber coupled with the primary chamber and having a lateral surface extending between a first open end and a second open end.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: June 13, 2000
    Assignee: Genzyme Transgenics Corporation
    Inventors: Simon J. Rothenberg, Richard Joel Hershman, Brian Alan Wong