Patents by Inventor Andrew T. Ruff

Andrew T. Ruff 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).

  • 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: 7153123
    Abstract: Stretched polymeric films can be used in a variety of applications, including optical applications. The stretching conditions and shape of the stretching tracks in a stretching apparatus can determine or influence film properties. Take-away systems can be used to receive the film after stretching. The configuration of the take-away system can, in at least some instances, influence final film properties.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: December 26, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Jeffery N. Jackson, William Ward Merrill, Andrew T. Ruff, Desiree L. Thompson
  • Patent number: 7141297
    Abstract: Optical bodies, comprising: a plurality of first optical layers comprising a first polymer composition that comprises (i) a polyester portion having terephthalate comonomer units and ethylene glycol comonomer units; and (ii) a second portion corresponding to a polymer having a glass transition temperature of at least about 130° C.; and a plurality of second optical layers disposed in a repeating sequence with the plurality of first optical layers. Also disclosed are optical bodies comprising: (a) a plurality of first optical layers, each first optical layer being oriented; and (b) a plurality of second optical layers, disposed in a repeating sequence with the plurality of first optical layers, comprising a blend of polymethylmethacrylate and polyvinylidene fluoride. Methods of making the above-described optical bodies, and articles employing such optical bodies are also provided.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: November 28, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Peter D. Condo, Timothy J. Hebrink, John A. Wheatley, Andrew J. Ouderkirk, Andrew T. Ruff, Yaoqi J. Liu, Milton H. Andrus, Jr.
  • Patent number: 7104776
    Abstract: Stretched polymeric films can be used in a variety of applications, including optical applications. The stretching conditions and shape of the stretching tracks in a stretching apparatus can determine or influence film properties. Methods and stretching apparatuses can include adjustable or zone-defined stretching regions.
    Type: Grant
    Filed: December 13, 2004
    Date of Patent: September 12, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: William W. Merrill, Jeffery N. Jackson, Andrew T. Ruff, Desiree L. Thompson, John A. Wheatley, Jeffrey D. Amundson, Curtis A Harvey
  • Patent number: 7094461
    Abstract: A multilayer optical polarizing film has optical layers whose refractive indices substantially match along orthogonal in-plane x- and y-axes, and that mismatch along a z-axis by at least 0.1 and in some cases by at least 0.15. The film has substantially no reflection bands at normal incidence, and for obliquely incident light has at least one reflection band, for p-polarized light only, that monotonically increases and that shifts to shorter wavelengths as the incidence angle increases.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: August 22, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Andrew T. Ruff, James M. Jonza, Timothy J. Hebrink, Laurence R. Gilbert
  • Patent number: 7064897
    Abstract: Multilayer films are provided that exhibit a colored appearance when viewed at an oblique angle as a result of one or more reflection bands in the visible region of the spectrum. The films however provide no substantial reflection bands in either the visible or near infrared regions for light normally incident on the film. The films can be made to shift from clear at normal incidence to an arbitrary designed color at an oblique angle without necessarily becoming cyan.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: June 20, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Timothy J. Hebrink, Laurence R. Gilbert, James M. Jonza, Andrew T. Ruff
  • Patent number: 6949212
    Abstract: Stretched polymeric films can be used in a variety of applications, including optical applications. The stretching conditions and shape of the stretching tracks in a stretching apparatus can determine or influence film properties. Methods and stretching apparatuses can include adjustable or zone-defined stretching regions.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: September 27, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: William W. Merrill, Jeffery N. Jackson, Andrew T. Ruff, Desiree L. Thompson, John A. Wheatley, Jeffrey D. Amundson, Curtis A. Harvey
  • 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: 6936209
    Abstract: Stretched polymeric films can be used in a variety of applications, including optical applications. The stretching conditions and shape of the stretching tracks in a stretching apparatus can determine or influence film properties. Take-away systems can be used to receive the film after stretching. The configuration of the take-away system can, in at least some instances, influence final film properties.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: August 30, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Jeffery N. Jackson, William Ward Merrill, Andrew T. Ruff, Desiree L. Thompson
  • Patent number: 6927900
    Abstract: A film includes a multilayer stack composed of unit cells having alternating optical layers of first and second diverse polymers A,B. The unit cells can consist essentially of two (AB), four (2A1B2C1B), or six layers (7A1B1A7B1A1B). The layers form an effective optical packet disposed between non-optical layers, the beginning and ending optical layers of which are selected to control an optical figure of merit such as spectral noise in the visible region. The arrangement of layers beginning at one end of the effective optical packet defines a specific cyclic permutation of the unit cell layer order, which provides a better figure of merit than an effective optical packet of similar design but having a different cyclic permutation.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: August 9, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Yaoqi J. Liu, Jerry A. Sievers, Andrew T. Ruff
  • 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: 6888677
    Abstract: Optical bodies, comprising: a plurality of first optical layers comprising a first polymer composition that comprises (i) a polyester portion having terephthalate comonomer units and ethylene glycol comonomer units, and (ii) a second portion corresponding to a polymer having a glass transition temperature of at least about 130° C.; and a plurality of second optical layers disposed in a repeating sequence with the plurality of first optical layers. Also disclosed are optical bodies comprising: (a) a plurality of first optical layers, each first optical layer being oriented; and (b) a plurality of second optical layers, disposed in a repeating sequence with the plurality of first optical layers, comprising a blend of polymethylmethacrylate and polyvinylidene fluoride. Methods of making the above-described optical bodies, and articles employing such optical bodies are also provided.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: May 3, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Peter D. Condo, Timothy J. Hebrink, John A. Wheatley, Andrew J. Ouderkirk, Andrew T. Ruff, Yaoqi J. Liu, Milton H. Andrus, Jr.
  • Patent number: 6797396
    Abstract: A birefringent dielectric multilayer film that reflects in a wavelength region of interest, and preferably reflects at least 50% of light in a band at least 100 nm wide, preferably positioned between wavelengths from about 700 nm to about 2000 nm. The film is heat set to render the film capable of shrinking to conform without substantial wrinkling to a substrate having a compound curvature. The film may be laminated to form a wide variety of non-planar articles.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: September 28, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Yaoqi J. Liu, Jeffrey A. Boettcher, Heather K. Kranz, Andrew T. Ruff, Brian L. Koster, David K. Mortenson
  • Publication number: 20040126549
    Abstract: A multilayer optical polarizing film has optical layers whose refractive indices substantially match along orthogonal in-plane x- and y-axes, and that mismatch along a z-axis by at least 0.1 and in some cases by at least 0.15. The film has substantially no reflection bands at normal incidence, and for obliquely incident light has at least one reflection band, for p-polarized light only, that monotonically increases and that shifts to shorter wavelengths as the incidence angle increases.
    Type: Application
    Filed: December 31, 2002
    Publication date: July 1, 2004
    Inventors: Andrew T. Ruff, James M. Jonza, Timothy J. Hebrink, Laurence R. Gilbert
  • Publication number: 20040125450
    Abstract: Multilayer films are provided that exhibit a colored appearance when viewed at an oblique angle as a result of one or more reflection bands in the visible region of the spectrum. The films however provide no substantial reflection bands in either the visible or near infrared regions for light normally incident on the film. The films can be made to shift from clear at normal incidence to an arbitrary designed color at an oblique angle without necessarily becoming cyan.
    Type: Application
    Filed: December 31, 2002
    Publication date: July 1, 2004
    Inventors: Timothy J. Hebrink, Laurence R. Gilbert, James M. Jonza, Andrew T. Ruff
  • Patent number: 6744561
    Abstract: Optical bodies, comprising: a plurality of first optical layers comprising a first polymer composition that comprises (i) a polyester portion having terephthalate comonomer units and ethylene glycol comonomer units, and (ii) a second portion corresponding to a polymer having a glass transition temperature of at least about 130° C.; and a plurality of second optical layers disposed in a repeating sequence with the plurality of first optical layers. Also disclosed are optical bodies comprising: (a) a plurality of first optical layers, each first optical layer being oriented; and (b) a plurality of second optical layers, disposed in a repeating sequence with the plurality of first optical layers, comprising a blend of polymethylmethacrylate and polyvinylidene fluoride. Methods of making the above-described optical bodies, and articles employing such optical bodies are also provided.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: June 1, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Peter D. Condo, Timothy J. Hebrink, John A. Wheatley, Andrew J. Ouderkirk, Andrew T. Ruff, Yaoqi J. Liu, Milton H. Andrus, Jr.
  • Publication number: 20040099992
    Abstract: Stretched polymeric films can be used in a variety of applications, including optical applications. The stretching conditions and shape of the stretching tracks in a stretching apparatus can determine or influence film properties. Methods and stretching apparatuses can include adjustable or zone-defined stretching regions.
    Type: Application
    Filed: November 27, 2002
    Publication date: May 27, 2004
    Inventors: William W. Merrill, Jeffrey N. Jackson, Andrew T. Ruff, Desiree L. Thompson, John A. Wheatley, Jeffrey D. Amundson, Curtis A. Harvey
  • Publication number: 20040099993
    Abstract: Stretched polymeric films can be used in a variety of applications, including optical applications. The stretching conditions and shape of the stretching tracks in a stretching apparatus can determine or influence film properties. Take-away systems can be used to receive the film after stretching. The configuration of the take-away system can, in at least some instances, influence final film properties.
    Type: Application
    Filed: November 27, 2002
    Publication date: May 27, 2004
    Inventors: Jeffery N. Jackson, William Ward Merrill, Andrew T. Ruff, Desiree L. Thompson
  • Publication number: 20040085642
    Abstract: Optical bodies, comprising: a plurality of first optical layers comprising a first polymer composition that comprises (i) a polyester portion having terephthalate comonomer units and ethylene glycol comonomer units, and
    Type: Application
    Filed: October 17, 2003
    Publication date: May 6, 2004
    Inventors: Peter D. Condo, Timothy J. Hebrink, John A. Wheatley, Andrew J. Ouderkirk, Andrew T. Ruff, Yaoqi J. Liu, Milton H. Andrus
  • Patent number: 6680114
    Abstract: Described are microfiber articles and methods and intermediates for their production, the microfiber articles being preferably produced from co-extruded microlayer films, and the articles having a microlayer construction that allows selection of the different layers to have different properties such that the article can have a desired combination of properties.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: January 20, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Robert S. Kody, Mario A. Perez, Andrew T. Ruff