Patents by Inventor Dennis L. Krueger

Dennis L. Krueger 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).

  • Publication number: 20160229111
    Abstract: A roll of multilayer optical film is described. The roll includes a substantially uniaxially-oriented multilayer optical film, where at least one layer of the multilayer optical film has indices of refraction in a length direction and a thickness direction that are substantially the same, but substantially different from an index of refraction in a width direction.
    Type: Application
    Filed: April 18, 2016
    Publication date: August 11, 2016
    Inventors: William W. Merrill, Jeffery N. Jackson, Andrew T. Ruff, John A. Wheatley, Dennis L. Krueger
  • Patent number: 9314961
    Abstract: A roll of multilayer optical film is described. The roll includes a substantially uniaxially-oriented multilayer optical film, where at least one layer of the multilayer optical film has indices of refraction in a length direction and a thickness direction that are substantially the same, but substantially different from an index of refraction in a width direction.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: April 19, 2016
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: William Ward Merrill, Jeffery N. Jackson, Andrew T. Ruff, John A. Wheatley, Dennis L. Krueger
  • Patent number: 8375950
    Abstract: A personal respiratory protection device that comprises a multilayer body including a stiffening layer, filter media layer(s) and inner or outer cover layer(s). The mask body includes a central portion between first and second portions, the central portion being defined by a fold, bond, weld, seam, or combination thereof and having a width of about 160 to 220 mm and a height of about 30 to 110 mm. The device is capable of being folded flat for storage with the first portion in at least partial face-to-face contact with a surface of the central portion and the second portion contacting a surface of the first portion. When unfolded for use the device is capable of forming a cup-shaped off the face air chamber over the nose and mouth of a wearer.
    Type: Grant
    Filed: April 17, 2006
    Date of Patent: February 19, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Graham J. Bostock, John W. Bryant, Desmond T. Curran, Christopher P. Henderson, Dennis L. Krueger, James F. Dyrud
  • Patent number: 8146594
    Abstract: A personal respiratory protection device that includes a multi-layered structure and first and second means for attaching a headband. The multilayered structure includes a filter medium and is divided into a flat upper panel, a flat non-rectangular central panel, and a lower panel. The central panel is separated from each of the upper and lower panels by first and second lines of demarcation. The first and second lines of demarcation converge towards the first and second means for attaching a headband. The multi-layered structure can be folded at the respective lines of demarcation so that the device can be folded flat for storage and can be opened to form a cup-shaped off the face air chamber over the nose and mouth of the wearer while an upper peripheral edge and a lower peripheral edge contact the wearer's face when the device is in use.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: April 3, 2012
    Assignee: 3M Innovative Properties Company
    Inventors: Graham J. Bostock, John W. Bryant, Desmond T. Curran, Christopher P. Henderson, Dennis L. Krueger, James F. Dyrud
  • Publication number: 20100254002
    Abstract: A stretcher for substantially uniaxially orienting a film includes a plurality of gripping members to hold opposing edge portions of the film, paths along which the gripping members travel to stretch the film in a stretching region, and a drive mechanism to convey the film and gripping members along a machine direction. At least a portion of the paths in the stretching region define diverging, curvilinear courses disposed in-plane. The paths are configured such that during the stretching an extent of uniaxial character, U, is between zero and unity and a minimum value of an extent of uniaxial character, U, is at least 0.70 over a final portion of the stretching after achieving a TDDR of 2.5. U is defined as U=(1/MDDR?1)/(TDDR1/2?1), wherein TDDR is greater than 4 at an end of the stretching region.
    Type: Application
    Filed: June 21, 2010
    Publication date: October 7, 2010
    Inventors: William Ward Merrill, Jeffery N. Jackson, Andrew T. Ruff, John A. Wheatley, Dennis L. Krueger
  • Patent number: 7740470
    Abstract: A stretcher for substantially uniaxially orienting a film includes a plurality of gripping members to hold opposing edge portions of the film, paths along which the gripping members travel to stretch the film in a stretching region, and a drive mechanism to convey the film and gripping members along a machine direction. At least a portion of the paths in the stretching region define diverging, curvilinear courses disposed in-plane. The paths are configured such that during the stretching an extent of uniaxial character, U, is between zero and unity and a minimum value of an extent of uniaxial character, U, is at least 0.70 over a final portion of the stretching after achieving a TDDR of 2.5. U is defined as U=(1/MDDR?1)/(TDDR1/2?1), wherein TDDR is greater than 4 at an end of the stretching region.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: June 22, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: William Ward Merrill, Jeffery N. Jackson, Andrew T. Ruff, John A. Wheatley, Dennis L. Krueger
  • Publication number: 20100095967
    Abstract: A personal respiratory protection device includes a multi-layered structure and first and second means for attaching a headband to hold the device in position on a wearer's face. The multilayered structure includes a filter medium and is divided into a flat upper panel having an upper peripheral edge, a flat non-rectangular central panel and a lower panel having a lower peripheral edge. The central panel is separated from each of the upper and lower panels by first and second lines of demarcation. The first and second lines of demarcation converge towards the first and second means for attaching a headband. The multi-layered structure is capable of being folded at the respective lines of demarcation so that the device can be folded flat for storage and can be opened to form a cup-shaped off the face air chamber over the nose and mouth of the wearer while the upper peripheral edge and the lower peripheral edge contact the wearer's face when the device is in use.
    Type: Application
    Filed: December 17, 2009
    Publication date: April 22, 2010
    Inventors: Graham J. Bostock, John W. Bryant, Desmond T. Curran, Christopher P. Henderson, Dennis L. Krueger, James F. Dyrud
  • Patent number: 7229271
    Abstract: A process for stretching films is described. The process preferably stretches films in a uniaxial fashion. Preferably, optical films are stretched including multilayer optical films. Other aspects of the invention include a roll of stretched film and an apparatus for stretching films.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: June 12, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: William Ward Merrill, Jeffery N. Jackson, Andrew T. Ruff, John A. Wheatley, Dennis L. Krueger
  • Patent number: 7153122
    Abstract: A process for stretching films is described. The process preferably stretches films in a uniaxial fashion. Preferably, optical films are stretched including multilayer optical films. Other aspects of the invention include a roll of stretched film and an apparatus for stretching films.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: December 26, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Jeffery N. Jackson, William Ward Merrill, Andrew T. Ruff, Desiree L. Thompson, Dennis L. Krueger
  • Patent number: 7069930
    Abstract: A personal respiratory protection device that comprises a mask body and an exhalation valve that is secured to the mask body. The mask body includes (i) a flat central panel; (ii) a flat first panel joined to the central panel through a fold-line, seam weld, or bond, the fold-line, seam, weld or bond of the first panel being substantially coextensive with an edge of the central panel; (iii) a flat second panel joined to the central panel through a fold-line, seam, weld or bond, the fold-line, seam, weld or bond of the second panel being substantially coextensive with an edge of the central panel. At least one of the center, first and second panels includes filter media. The device is capable of being folded for storage with the first and second panels in at least partial face-to-face contact with a common surface of the central panel and, during use, is capable of forming, over the nose and mouth of the wearer, a cup-shaped air chamber having a face-contacting periphery.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: July 4, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Graham J. Bostock, John W. Bryant, Desmond T. Curran, Christopher P. Henderson, Dennis L. Krueger, James F. Dyrud
  • Patent number: 6939499
    Abstract: A process for stretching films is described. The process preferably stretches films in a uniaxial fashion. Preferably, optical films are stretched including multilayer optical films. Other aspects of the invention include a roll of stretched film and an apparatus for stretching films.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: September 6, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: William Ward Merrill, Jeffery N. Jackson, Andrew T. Ruff, John A. Wheatley, Dennis L. Krueger
  • Patent number: 6916440
    Abstract: A process for stretching films is described. The process preferably stretches films in a uniaxial fashion. Preferably, optical films are stretched including multilayer optical films. Other aspects of the invention include a roll of stretched film and an apparatus for stretching films.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: July 12, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Jeffery N. Jackson, William Ward Merrill, Andrew T. Ruff, Desiree L. Thompson, Dennis L. Krueger
  • Patent number: 6886563
    Abstract: Fold-flat personal respiratory protection devices that have a flat substantially rectangular central portion having first and second edges, at flat first member joined to the first edge of the central portion through either a fold-line, seam, weld or bond, said fold, bond, weld or seam of the first member being substantially coextensive with said first edge of said central portion, and a flat second member joined to the second edge of the central portion through either a fold-line, seam, weld or bond, the fold, bond, weld or seam of the second member being substantially coextensive with said second edge of said central portion. At least one of the central portion and first and second members are formed from filter media.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: May 3, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Graham J. Bostock, John W. Bryant, Desmond T. Curran, Christopher P. Henderson, Dennis L. Krueger, James F. Dyrud
  • Publication number: 20040237964
    Abstract: Fold-flat personal respiratory protection devices that have a flat substantially rectangular central portion having first and second edges, at flat first member joined to the first edge of the central portion through either a fold-line, seam, weld or bond, said fold, bond, weld or seam of the first member being substantially coextensive with said first edge of said central portion, and a flat second member joined to the second edge of the central portion through either a fold-line, seam, weld or bond, the fold, bond, weld or seam of the second member being substantially coextensive with said second edge of said central portion. At least one of the central portion and first and second members are formed from filter media.
    Type: Application
    Filed: March 11, 2004
    Publication date: December 2, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Graham J. Bostock, John W. Bryant, Desmond T. Curran, Christopher P. Henderson, Dennis L. Krueger, James F. Dyrud
  • Patent number: 6767492
    Abstract: A die apparatus, a method of using the die apparatus to produce co-extruded polymeric articles, and co-extruded polymeric articles produced using the die apparatus and method are disclosed. The die apparatus includes a hollow vane configured to extrude a material into a chamber within the die, thereby producing a co-extruded web. The co-extruded web has a plurality of distinct, discontinuous phases in the cross-web direction, the phases having a uniform width as shown by a coefficient of variation of less than 8 percent for any three consecutive phases. The phases are substantially continuous down-web and are surrounded by a matrix having two or more layers.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: July 27, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Scott G Norquist, Dennis L Krueger, Alan J. Sipinen, Thomas P Hanschen, Ronald P Leseman
  • Patent number: 6722366
    Abstract: A method of making a personal respiratory protection device. The method comprises: (a) forming a multi-layered structure that comprises a first cover web, a filtration layer that comprises a web that contains electrically-charged microfibers, and a second cover web; and (b) adapting the multi-layered structure into a first panel, a central panel, and a second panel such that the central panel is separated from each of the first and second panels by first and second lines of demarcation, and each of the first, second, and central panels is non-pleated. The first and second cover webs are disposed on first and second opposing sides of the filtration layer, respectively, and at least one of the cover webs comprises spunbond fibers. The resulting respiratory protection device is capable of being folded flat at the respective lines of demarcation for storage and can be opened to form a cup-shaped air chamber over the nose and mouth of the wearer when in use.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: April 20, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Graham J. Bostock, John W. Bryant, Desmond T. Curran, Christopher P. Henderson, Dennis L. Krueger, James F. Dyrud
  • Patent number: 6715489
    Abstract: Fold-flat personal respiratory protection devices are provided. The devices have a flat central portion having first and second edges, a flat first member joined to the first edge through either a fold-line, seam, weld or bond that is substantially coextensive with the first edge, and a flat second member joined to the second edge through either a fold-line, seam, weld or bond that is substantially coextensive with the second edge. At least one of the central portion and first and second members are formed from filter media. The device is capable of being folded flat for storage with the first and second members being in at least partial face-to-face contact with a common surface of the central portion and, during use, is capable of forming a cup-shaped air chamber over the nose and mouth of the wearer.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: April 6, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Graham J. Bostock, John W. Bryant, Desmond T. Curran, Christopher P. Henderson, Dennis L. Krueger, James F. Dyrud
  • Patent number: 6635334
    Abstract: A polymeric film having a plurality of perforations is described. The polymeric film provides a strong, high-tensile strength material that permits hand tearing of the film along one or two axes. In specific implementations, the polymeric film is incorporated into a multi-layer film having cloth-like properties of strength and tear propagation, and is suitable for use various adhesive tape applications. Methods of making the polymeric film are also disclosed.
    Type: Grant
    Filed: August 8, 2000
    Date of Patent: October 21, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Jeffery Jackson, Dennis L. Krueger
  • Publication number: 20030192546
    Abstract: Fold-flat personal respiratory protection devices are provided. The devices have a flat central portion having first and second edges, a flat first member joined to the first edge of the central portion through either a fold-line, seam, weld or bond, said fold, bond, weld or seam of the first member being substantially coextensive with said first edge of said central portion, and a flat second member joined to the second edge of the central portion through either a fold-line, seam, weld or bond, the fold, bond, weld or seam of the second member being substantially coextensive with said second edge of said central portion. At least one of the central portion and first and second members are formed from filter media.
    Type: Application
    Filed: March 25, 2003
    Publication date: October 16, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Graham J. Bostock, John W. Bryant, Desmond T. Curran, Christopher P. Henderson, Dennis L. Krueger, James F. Dyrud
  • Patent number: 6630238
    Abstract: A pressure-sensitive adhesive comprising a blend of at least two components, wherein the first component is at least one pressure-sensitive adhesive and the second component is at least one thermoplastic material, wherein the components form a blended composition having more than one domain and, wherein one domain is substantially continuous (generally, the pressure-sensitive adhesive) and the other domain is substantially fibrillous to schistose (generally, the thermoplastic material). The second component can be (a) at least one thermoplastic elastomer, (b) at least one elastomer with a tackifying resin or (c) at least one elastomer.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: October 7, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Patrick D. Hyde, Dennis L. Krueger, Felix P. Lau, Eumi Pyun, Robert W. Shipman, Pamela S. Tucker, Roy Wong, David J. Yarusso