Patents by Inventor Alfred J. Heidinger

Alfred J. Heidinger 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).

  • Analytic sieving apparatus
    Patent number: 4681676
    Abstract: Improved sieving apparatus for size analysis of dry powder having a sample chamber floored by a sieving screen and an underlying fines chamber adapted to be mated in fluid communication therewith. Disposed beneath the screen is a jet emitting rotor of selective configuration adapted to emit an upwardly directed air jet curtain to repeatedly sweep the underside of the screen to both improve the screening action and to reduce the required time therefore.
    Type: Grant
    Filed: March 28, 1985
    Date of Patent: July 21, 1987
    Assignee: Mikropul Corporation
    Inventors: Alfred J. Heidinger, Robert W. Duyckinck