Patents by Inventor Vera L. Lightle

Vera L. Lightle 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: 7468406
    Abstract: A durable colored article having fluorescent properties comprises a substantially solventless polyvinyl chloride matrix, a thioxanthene fluorescent dye, and a secondary or tertiary hindered amine light stabilizer having a molecular weight less than about 1000 grams/mole. The invention has the advantage in that it provides a flexible polyvinyl chloride film that exhibits durable fluorescent colors.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: December 23, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Kenneth M. White, Lee A. Pavelka, Vera L. Lightle, James C. Coderre
  • Patent number: 7449514
    Abstract: A durable colored article having fluorescent properties comprises a substantially solventless polyvinyl chloride matrix, a thioxanthene fluorescent dye, and a secondary or tertiary hindered amine light stabilizer having a molecular weight less than about 1000 grams/mole. The invention has the advantage in that it provides a flexible polyvinyl chloride film that exhibits durable fluorescent colors.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: November 11, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Kenneth M. White, Lee A. Pavelka, Vera L. Lightle, James C. Coderre
  • Publication number: 20030104235
    Abstract: A durable colored article having fluorescent properties comprises a substantially solventless polyvinyl chloride matrix, a thioxanthene fluorescent dye, and a secondary or tertiary hindered amine light stabilizer having a molecular weight less than about 1000 grams/mole. The invention has the advantage in that it provides a flexible polyvinyl chloride film that exhibits durable fluorescent colors.
    Type: Application
    Filed: November 26, 2002
    Publication date: June 5, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Kenneth M. White, Lee A. Pavelka, Vera L. Lightle, James C. Coderre
  • Patent number: 6526588
    Abstract: A durable colored article having fluorescent properties comprises a substantially solventless polyvinyl chloride matrix, a thioxanthene fluorescent dye, and a secondary or tertiary hindered amine light stabilizer having a molecular weight less than about 1000 grams/mole. The invention has the advantage in that it provides a flexible polyvinyl chloride film that exhibits durable fluorescent colors.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: March 4, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Kenneth M. White, Lee A. Pavelka, Vera L. Lightle, James C. Coderre
  • Publication number: 20020090530
    Abstract: A durable colored article having fluorescent properties comprises a substantially solventless polyvinyl chloride matrix, a thioxanthene fluorescent dye, and a secondary or tertiary hindered amine light stabilizer having a molecular weight less than about 1000 grams/mole. The invention has the advantage in that it provides a flexible polyvinyl chloride film that exhibits durable fluorescent colors.
    Type: Application
    Filed: December 20, 2001
    Publication date: July 11, 2002
    Applicant: 3M Innovative Properties Company
    Inventors: Kenneth M. White, Lee A. Pavelka, Vera L. Lightle, James C. Coderre
  • Patent number: 6406798
    Abstract: A durable colored article having fluorescent properties comprises a substantially solventless polyvinyl chloride matrix, a thioxanthene fluorescent dye, and a secondary or tertiary hindered amine light stabilizer having a molecular weight less than about 1000 grams/mole. The invention has the advantage in that it provides a flexible polyvinyl chloride film that exhibits durable fluorescent colors.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: June 18, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Kenneth M. White, Lee A. Pavelka, Vera L. Lightle, James C. Coderre
  • Publication number: 20010046607
    Abstract: A durable colored article having fluorescent properties comprises a substantially solventless polyvinyl chloride matrix, a thioxanthene fluorescent dye, and a secondary or tertiary hindered amine light stabilizer having a molecular weight less than about 1000 grams/mole. The invention has the advantage in that it provides a flexible polyvinyl chloride film that exhibits durable fluorescent colors.
    Type: Application
    Filed: June 14, 2000
    Publication date: November 29, 2001
    Inventors: Kenneth M. White, Lee A. Pavelka, Vera L. Lightle, James C. Coderre
  • Patent number: 6153128
    Abstract: A retroreflective article has first and second segments each comprising a binder layer and a multitude of microspheres partially embedded in the front surface of the binder layer. The first segment also has an opaque reflective metal layer disposed on the embedded portions of the microspheres; whereas, the second segment lacks such an opaque reflective metal layer and thereby allows the color of the underlying binder layer to be seen from the front side of the retroreflective article. The first and second segments display noticeably different colors under daytime lighting conditions, and each possesses a distinctly different retroreflective efficiency when viewed under retroreflective lighting conditions. The first and second segments therefore stand out in contrast to each other to enhance the conspicuity of the retroreflective article.
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: November 28, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Vera L. Lightle, Britton G. Billingsley
  • Patent number: 6110558
    Abstract: An article of clothing 10 bearing a retroreflective applique 12 that has a binder layer 14 onto which a retroreflective layer 19 is disposed. The retroreflective layer 19 includes a layer of optical elements 16 and a metal reflective layer 18, and the binder layer 14 includes a thermoplastic copolymer that includes units which contain carboxyl groups. A retroreflective applique, which uses such a binder layer in conjunction with aluminum-coated or silver-coated optical elements, demonstrates very good home laundering durability.
    Type: Grant
    Filed: April 10, 1998
    Date of Patent: August 29, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Britton G. Billingsley, Vera L. Lightle
  • Patent number: 6110566
    Abstract: A durable colored article having fluorescent properties comprises a substantially solventless polyvinyl chloride matrix, a thioxanthene fluorescent dye, and a secondary or tertiary hindered amine light stabilizer having a molecular weight less than about 1000 grams/mole. The invention has the advantage in that it provides a flexible polyvinyl chloride film that exhibits durable fluorescent colors.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: August 29, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Kenneth M. White, Lee A. Pavelka, Vera L. Lightle, James C. Coderre
  • Patent number: 6059915
    Abstract: A retroreflective applique (10) includes a supporting structure (12), a layer of optical lens elements (14), and a reflective material (16). The layer of optical lens elements (14) is partially embedded in the supporting structure (12), and the reflective material (16) is disposed on the embedded portion of the layer of optical lens elements (14). The supporting structure (12) may contain a binder layer (24) and a heat-activatable adhesive layer (26). The binder layer (24) includes a non-filamentary acrylic polymer layer. The use of such a supporting structure (12) eliminates the need for a release liner on the rear surface (20) of the heat-activatable adhesive layer (26), and it also enables a carrier web (28) to be separated from the polymeric supporting structure (12) before the applique (16) is permanently secured to a substrate. The separation step can be accomplished without causing substantial harm to the retroreflective performance of the applique (10).
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: May 9, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Vera L. Lightle, Britton G. Billingsley
  • Patent number: 5889615
    Abstract: Dual axis retroreflective articles and methods of using them are disclosed. The retroreflective articles may combine dual axis retroreflection with three axis retroreflection to provide a steady glow due to the three axis retroreflective portions of the article and also provide intermittent or flashing retroreflection as the plane of retroreflection from the dual axis retroreflector passes through or near the light source. The retroreflective articles may also include dual axis retroreflective structures in combination with sparkling reflective structures, as well as dual axis retroreflective structures in combination with both three axis retroreflective structures and sparkling reflective structures. Methods of use include moving the dual axis retroreflective structures to obtain intermittent or flashing retroreflection.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: March 30, 1999
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John F. Dreyer, Kenneth M. White, Vera L. Lightle
  • Patent number: 5738746
    Abstract: An article of clothing 10 bearing a retroreflective applique 12 that has a binder layer 14 onto which a retroreflective layer 19 is disposed. The retroreflective layer 19 includes a layer of optical elements 16 and a metal reflective layer 18, and the binder layer 14 includes a thermoplastic copolymer that includes units which contain carboxyl groups. A retroreflective applique, which uses such a binder layer in conjunction with aluminum-coated or silver-coated optical elements, demonstrates very good home laundering durability.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: April 14, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Britton G. Billingsley, Vera L. Lightle
  • Patent number: 5695853
    Abstract: A high visibility fabric includes a web of fibrous material and a fluorescent layer. The web has first and second major surfaces, and the fluorescent layer includes fluorescent pigment in a crosslinked resin. The resin penetrates into the web to surround the fibers and is bonded thereto, but the fluorescent pigment is concentrated at the first major surface at a level greater than at the second major surface. Because the pigment concentrates at the one surface, considerably less pigment is used in producing a fluorescent colored fabric. The fabric can be used to form a safety vest, and retroreflective sheeting can be placed on the vest to further enhance visibility.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: December 9, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Britton G. Billingsley, Vera L. Lightle, David P. Swanson
  • Patent number: 5691846
    Abstract: A method for manufacturing flexible cube corner retroreflective sheeting comprising the steps of:a) providing a tool having a molding surface;b) applying to the molding surface a volume of a flowable resin composition;c) contacting the resin composition with a first major surface of an overlay film;d) minimizing excess resin composition;e) curing the resin composition to form a sheeting comprising an array of cube corner elements bonded to the overlay film;f) removing the sheeting from the tool; andg) applying mechanical stress to the sheeting so as to cause a fractured separation of substantially each individual cube corner element from surrounding cube corner elements.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 25, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Olester Benson, Jr., Cheryl M. Frey, Jeanine M. Shusta, Susan K. Nestegard, Vera L. Lightle, Kenneth L. Smith, Chester A. Bacon, Jr.
  • Patent number: 5478628
    Abstract: A high visibility fabric having a non-woven web material with a fluorescent layer. The fluorescent pigment concentration in the fabric is greater proximate a designated fabric outer surface than at other outer surfaces of the fabric. The fabric is used for manufacturing safety vests, signage, and other articles requiring high visibility.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: December 26, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Britton G. Billingsley, Vera L. Lightle, David P. Swanson, Claus Jansen
  • Patent number: 5378520
    Abstract: Encapsulated-lens retroreflective sheeting comprising (1) a layer of binder material having a layer of retroreflective elements partially embedded in its top surface; (2) a transparent cover sheet disposed in spaced relation from the layer of retroreflective elements; (3) a network of narrow intersecting bonds comprising binder material embossed from the layer of binder material into contact with the cover sheet so as to adhere the layer of binder material and cover sheet together and form a plurality of cells within which retroreflective elements are hermetically sealed; the embossing of the layer of binder material leaving the bottom surface of the layer of binder material with an embossed configuration; and (4) a support sheet lastingly and directly adhered to said bottom surface of the layer of binder material and embossed with the layer of binder material so as to follow the embossed configuration of said bottom surface.
    Type: Grant
    Filed: December 16, 1992
    Date of Patent: January 3, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Yoshiyuki Nagaoka, Vera L. Lightle
  • Patent number: 5207852
    Abstract: Flexible, self-supporting, air-permeable retroreflective sheeting comprising a two-sided, self-supporting, air-permeable web of thermoplastic filaments with retroreflective elements partially embedded in the filaments on one side of the web. On the other side of the web, the surfaces of the filaments are substantially free of retroreflective elements. In some embodiments, the web may be used as a bonding agent to secure the sheeting to a desired substrate.
    Type: Grant
    Filed: March 16, 1992
    Date of Patent: May 4, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Vera L. Lightle, Johann F. Petersen, Wallace K. Bingham
  • Patent number: 5128804
    Abstract: Flexible, self-supporting, air-permeable retroreflective sheeting comprising a two-sided, self-supporting, air-permeable web of thermoplastic filaments with retroreflective elements partially embedded in the filaments on one side of the web. On the other side of the web, the surfaces of the filaments are substantially free of retroreflective elements. In some embodiments, the web may be used as a bonding agent to secure the sheeting to a desired substrate.
    Type: Grant
    Filed: February 6, 1991
    Date of Patent: July 7, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Vera L. Lightle, Johann F. Petersen, Wallace K. Bingham