Patents by Inventor Joel W. Miller

Joel W. Miller 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 electret fibers
    Patent number: 6776951
    Abstract: A method of making electret fibers, which method comprises: extruding a polymeric material to create fibers; and imparting an electric charge to the fibers; wherein the resulting fibers have a level of extractable hydrocarbon material that is less than 3.0 weight percent, based on the weight of the fibers.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: August 17, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Alan D. Rousseau, Joel W. Miller
  • Method of making electret fibers
    Publication number: 20020041045
    Abstract: Electret fibers that contain a polymeric material and a fluorochemical additive. The electret fibers have a low level of extractable hydrocarbon material. Electret filters that have low extractable hydrocarbon levels exhibit improved filtration performance.
    Type: Application
    Filed: September 25, 2001
    Publication date: April 11, 2002
    Applicant: 3M Innovative Properties Company
    Inventors: Alan D. Rousseau, Joel W. Miller
  • Method of making electret fibers that have low level of extractable hydrocarbon material
    Patent number: 6319452
    Abstract: A method of making electret fibers, which method comprises the steps of: blending a polymeric material with a fluorochemical additive compound; extruding the blend at a temperature maintained below 290° C. to form extruded fibers; and annealing and charging the extruded fibers; wherein the polymeric material and extrusion conditions are selected such that the resulting fibers have a level of extractable hydrocarbon material that is less than about 3.0 weight percent based on the weight of the fibers.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: November 20, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: Alan D. Rousseau, Joel W. Miller
  • Predicting electret performance by measuring level of extractable hydrocarbons
    Patent number: 6237595
    Abstract: A method of predicting the performance of electret filter web involves measuring the level of extractable hydrocarbon material in the web. Electret filters that have low extractable hydrocarbon levels exhibit improved filtration performance.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: May 29, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: Alan D. Rousseau, Joel W. Miller
  • Electret fibers and filter webs having a low level of extractable hydrocarbons
    Patent number: 6213122
    Abstract: Electret fibers that contain a polymeric material and a fluorochemical additive. The electret fibers have a low level of extractable hydrocarbon material. Electret filters that have low extractable hydrocarbon levels exhibit improved filtration performance.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: April 10, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: Alan D. Rousseau, Joel W. Miller