Patents by Inventor David Loren Vall

David Loren Vall 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).

  • Breathable polymer foams
    Patent number: 7083849
    Abstract: A continuous method for making porous foam and the foam articles are described. The method allows for tailoring the porosity of the foam by controlling process variables including draw rate and blowing agent concentration. A method for co-extruding the foams with other materials is also described.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: August 1, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Bonnie Weiskopf Albrecht, Mark David Gehlsen, Connie Lynn Hubbard, David Loren Vall, Bryan C. Feisel
  • Reduced density foam articles and process for making
    Publication number: 20040033350
    Abstract: The invention discloses reduced density foams and methods of making the foams by applying or creating a nonfoaming barrier layer on a foamable layer, which barrier layer inhibits the escape of fugitive gases during the foaming process.
    Type: Application
    Filed: August 15, 2003
    Publication date: February 19, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Mark David Gehlsen, David Loren Vall, Bonnie Weiskopf Albrecht
  • Uniform small cell foams and a continuous process for making same
    Patent number: 6638985
    Abstract: A continuous method for making foams having uniform and/or small cell sizes and articles made with these foams are described. The method allows for adjusting or controlling cell size and cell size distribution by controlling temperature and/or blowing agent concentration. The foams feature small and/or uniform cell sizes and may be comprised of amorphous thermoplastic polymers, pressure sensitive adhesive compositions, and immiscible thermoplastic polymer compositions. A method for coextruding the foams is also described.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: October 28, 2003
    Assignee: 3M Innovative Properties Co.
    Inventors: Mark David Gehlsen, David Loren Vall, Craig Allen Perman, Bonnie Weiskopf Albrecht
  • Reduced density foam articles and process for making
    Patent number: 6623674
    Abstract: The invention discloses reduced density foams and methods of making the foams by applying or creating a nonfoaming barrier layer on a foamable layer, which barrier layer inhibits the escape of fugitive gases during the foaming process.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: September 23, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Mark David Gehlsen, David Loren Vall, Bonnie Weiskopf Albrecht
  • Uniform small cell foams and a continuous process for making same
    Patent number: 6593380
    Abstract: A continuous method for making foams having uniform and/or small cell sizes and articles made with these foams are described. The method allows for adjusting or controlling cell size and cell size distribution by controlling temperature and/or blowing agent concentration. The foams feature small and/or uniform cell sizes and may be comprised of amorphous thermoplastic polymers, pressure sensitive adhesive compositions, and immiscible thermoplastic polymer compositions. A method for coextruding the foams is also described.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: July 15, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Mark David Gehlsen, David Loren Vall, Craig Allen Perman, Bonnie Weiskopf Albrecht
  • Uniform small cell foams and a continuous process for making same
    Patent number: 6586482
    Abstract: A continuous method for making foams having uniform and/or small cell sizes and articles made with these foams are described. The method allows for adjusting or controlling cell size and cell size distribution by controlling temperature and/or blowing agent concentration. The foams feature small and/or uniform cell sizes and may be comprised of amorphous thermoplastic polymers, pressure sensitive adhesive compositions, and immiscible thermoplastic polymer compositions. A method for coextruding the foams is also described.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: July 1, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Mark David Gehlsen, David Loren Vall, Craig Allen Perman, Bonnie Weiskopf Albrecht
  • Uniform small cell foams and a continuous process for making same
    Patent number: 6586489
    Abstract: A continuous method for making foams having uniform and/or small cell sizes and articles made with these foams are described. The method allows for adjusting or controlling cell size and cell size distribution by controlling temperature and/or blowing agent concentration. The foams feature small and/or uniform cell sizes and may be comprised of amorphous thermoplastic polymers, pressure sensitive adhesive compositions, and immiscible thermoplastic polymer compositions. A method for coextruding the foams is also described.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: July 1, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Mark David Gehlsen, David Loren Vall, Craig Allen Perman, Bonnie Weiskopf Albrecht
  • Uniform small cell foams and a continuous process for making same
    Publication number: 20020169224
    Abstract: A continuous method for making foams having uniform and/or small cell sizes and articles made with these foams are described. The method allows for adjusting or controlling cell size and cell size distribution by controlling temperature and/or blowing agent concentration. The foams feature small and/or uniform cell sizes and may be comprised of amorphous thermoplastic polymers, pressure sensitive adhesive compositions, and immiscible thermoplastic polymer compositions. A method for coextruding the foams is also described.
    Type: Application
    Filed: November 27, 2001
    Publication date: November 14, 2002
    Applicant: 3M Innovative Properties Company
    Inventors: Mark David Gehlsen, David Loren Vall, Craig Allen Perman, Bonnie Weiskopf Albrecht
  • Uniform small cell foams and a continuous process for making same
    Publication number: 20020151608
    Abstract: A continuous method for making foams having uniform and/or small cell sizes and articles made with these foams are described. The method allows for adjusting or controlling cell size and cell size distribution by controlling temperature and/or blowing agent concentration. The foams feature small and/or uniform cell sizes and may be comprised of amorphous thermoplastic polymers, pressure sensitive adhesive compositions, and immiscible thermoplastic polymer compositions. A method for coextruding the foams is also described.
    Type: Application
    Filed: November 27, 2001
    Publication date: October 17, 2002
    Applicant: 3M Innovative Properties Company
    Inventors: Mark David Gehlsen, David Loren Vall, Craig Allen Perman, Bonnie Weiskopf Albrecht
  • Uniform small cell foams and a continuous process for making same
    Publication number: 20020151607
    Abstract: A continuous method for making foams having uniform and/or small cell sizes and articles made with these foams are described. The method allows for adjusting or controlling cell size and cell size distribution by controlling temperature and/or blowing agent concentration. The foams feature small and/or uniform cell sizes and may be comprised of amorphous thermoplastic polymers, pressure sensitive adhesive compositions, and immiscible thermoplastic polymer compositions. A method for coextruding the foams is also described.
    Type: Application
    Filed: November 27, 2001
    Publication date: October 17, 2002
    Applicant: 3M Innovative Properties Company
    Inventors: Mark David Gehlsen, David Loren Vall, Craig Allen Perman, Bonnie Weiskopf Albrecht
  • Uniform small cell foams and a continuous process for making same
    Publication number: 20020137808
    Abstract: A continuous method for making foams having uniform and/or small cell sizes and articles made with these foams are described. The method allows for adjusting or controlling cell size and cell size distribution by controlling temperature and/or blowing agent concentration. The foams feature small and/or uniform cell sizes and may be comprised of amorphous thermoplastic polymers, pressure sensitive adhesive compositions, and immiscible thermoplastic polymer compositions. A method for coextruding the foams is also described.
    Type: Application
    Filed: November 27, 2001
    Publication date: September 26, 2002
    Applicant: 3M Innovative Properties Company
    Inventors: Mark David Gehlsen, David Loren Vall, Craig Allen Perman, Bonnie Weiskopf Albrecht
  • Uniform small cell foams and a continuous process for making same
    Patent number: 6391931
    Abstract: A continuous method for making foams having uniform and/or small cell sizes and articles made with these foams are described. The method allows for adjusting or controlling cell size and cell size distribution by controlling temperature and/or blowing agent concentration. The foams feature small and/or uniform cell sizes and may be comprised of amorphous thermoplastic polymers, pressure sensitive adhesive compositions, and immiscible thermoplastic polymer compositions. A method for coextruding the foams is also described.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: May 21, 2002
    Inventors: Mark David Gehlsen, David Loren Vall, Craig Allen Perman, Bonnie Weiskopf Albrecht