Patents by Inventor Marvin J. Niezgocki

Marvin J. Niezgocki 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 tool to produce optical film
    Patent number: 6581286
    Abstract: An optical film having structures that vary in height along their length where the variations have a nominal period of less than forty times the nominal height of the structures is taught. In some embodiments of the invention the variation is random.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: June 24, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Alan B. Campbell, Sanford Cobb, Jr., Wade D. Kretman, Marvin J. Niezgocki, Timothy L. Hoopman
  • Optical film
    Publication number: 20020057564
    Abstract: An optical film having structures that vary in height along their length where the variations have a nominal period of less than forty times the nominal height of the structures is taught. In some embodiments of the invention the variation is random.
    Type: Application
    Filed: January 16, 2002
    Publication date: May 16, 2002
    Applicant: 3M Innovative Properties Company
    Inventors: Alan B. Campbell, Sanford Cobb, Wade D. Kretman, Marvin J. Niezgocki, Timothy L. Hoopman
  • Optical film
    Patent number: 6354709
    Abstract: An optical film having structures that vary in height along their length where the variations have a nominal period of less than forty times the nominal height of the structures is taught. In some embodiments of the invention the variation is random.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: March 12, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Alan B. Campbell, Sanford Cobb, Jr., Wade D. Kretman, Marvin J. Niezgocki, Timothy L. Hoopman
  • Air filter system for helical scanner drum with vented drum cover
    Patent number: 5359475
    Abstract: The present invention concerns a filter system for a helical scanner drum of the type having a drum cover provided with an air vent. The filter system includes a replaceable air filter element for entrapping airborne particles when air is drawn through the filter element and means for removably securing the filter element to the drum cover such that the filter element covers the air vent.
    Type: Grant
    Filed: March 23, 1992
    Date of Patent: October 25, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Lester M. Aseere, Gerald J. Niles, Robert L. Hanson, Marvin J. Niezgocki