Patents by Inventor Manfred E. Riechert

Manfred E. Riechert 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).

  • Method of making thermoplastic foamed articles using supercritical fluid
    Patent number: 5670102
    Abstract: Foamed thermoplastic articles, both filled and unfilled foamed articles have a foamed density of greater than 0.03 grams per cubic centimeters (g/cm.sup.3), cell sizes in the range of 10 to 300 micrometers (.mu.m) with cell wall thicknesses of greater than 0.1 .mu.m but less than 2 .mu.m and a process for making the same.
    Type: Grant
    Filed: January 25, 1994
    Date of Patent: September 23, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Craig A. Perman, William A. Hendrickson, Manfred E. Riechert
  • Method of polymer impregnation
    Patent number: 5508060
    Abstract: Methods of impregnating various polymer substrates with an impregnation additive, by simultaneously contacting the polymer substrate with an impregnation additive, carrier liquid, and supercritical fluid are provided. The impregnation additive is substantially insoluble in the supercritical fluid, and the carrier liquid is preferably substantially insoluble in the supercritical fluid.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: April 16, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Craig A. Perman, Joanne M. Bartkus, Hye-Ok Choi, Manfred E. Riechert, Kelvin J. Witcher, Richard C. Kao, James S. Stefely, John E. Gozum
  • Methods of polymer impregnation
    Patent number: 5340614
    Abstract: Methods of impregnating various polymer substrates with an impregnation additive, by simultaneously contacting the polymer substrate with an impregnation additive, carrier liquid, and supercritical fluid are provided. The impregnation additive is substantially insoluble in the supercritical fluid, and the carrier liquid is preferably substantially insoluble in the supercritical fluid.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: August 23, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Craig A. Perman, Manfred E. Riechert