Patents by Inventor Ruth A. Ebbens

Ruth A. Ebbens 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).

  • Dimensionally stable bonded nonwoven fibrous webs
    Patent number: 8802002
    Abstract: A method for making a bonded nonwoven fibrous web comprising extruding melt blown fibers of a polymeric material, collecting the melt blown fibers as an initial nonwoven fibrous web, annealing the initial nonwoven fibrous web with a controlled heating and cooling operation, and collecting the dimensionally stable bonded nonwoven fibrous web is described. The bonded nonwoven fibrous web shrinkage is typically less than 4 percent relative to the initial nonwoven fibrous web.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: August 12, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Michael R. Berrigan, John D. Stelter, Ruth A. Ebbens, Sian F. Fennessey
  • DIMENSIONALLY STABLE BONDED NONWOVEN FIBROUS WEBS
    Publication number: 20140024279
    Abstract: A dimensionally stable bonded nonwoven fibrous web formed by extruding melt blown fibers of a polymeric material, collecting the melt blown fibers as an initial nonwoven fibrous web, and annealing the initial nonwoven fibrous web with a controlled heating and cooling operation, is described. The bonded nonwoven fibrous web shrinkage is typically less than 4 percent relative to the initial nonwoven fibrous web.
    Type: Application
    Filed: September 20, 2013
    Publication date: January 23, 2014
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Michael R. Berrigan, John D. Stelter, Ruth A. Ebbens, Sian F. Fennessey
  • DIMENSIONALLY STABLE BONDED NONWOVEN FIBROUS WEBS
    Publication number: 20080160861
    Abstract: A method for making a bonded nonwoven fibrous web comprising extruding melt blown fibers of a polymeric material, collecting the melt blown fibers as an initial nonwoven fibrous web, annealing the initial nonwoven fibrous web with a controlled heating and cooling operation, and collecting the dimensionally stable bonded nonwoven fibrous web is described. The bonded nonwoven fibrous web shrinkage is typically less than 4 percent relative to the initial nonwoven fibrous web.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Inventors: Michael R. Berrigan, John D. Stelter, Ruth A. Ebbens, Sian F. Fennessey
  • Method of making a thermally stable acoustical insulation microfiber web
    Patent number: 5961904
    Abstract: There is provided a thermally stabilized polypropylene melt-blown microfiber acoustical insulation web which has a resistance to thermal degradation at a temperature of 135.degree. C. for at least 10 days. The polypropylene has a thermal stabilizer uniformly distributed within the melt-blown microfiber polymer which polymer when produced is subject to thermal and/or catalytic degradation in the absence of significant levels of thermal stabilizer or antioxidant.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: October 5, 1999
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventors: Michael D. Swan, Ruth A. Ebbens
  • Thermally stable acoustical insulation
    Patent number: 5773375
    Abstract: There is provided thermally stabilized polypropylene melt-blown microfiber acoustical insulation web which has a resistance to thermal degradation at a temperature of 135.degree. C. for at least 10 days. The polypropylene has a thermal stabilizer uniformly distributed within the melt-blown microfiber polymer which polymer when produced is subject to thermal and/or catalytic degradation in the absence of significant levels of thermal stabilizer or antioxidant.
    Type: Grant
    Filed: May 29, 1996
    Date of Patent: June 30, 1998
    Inventors: Michael D. Swan, Ruth A. Ebbens