Patents by Inventor Leif Olson

Leif Olson 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: 8840029
    Abstract: A system and method for authentication of secure products is disclosed. The security feature contains a first component in the form of an emitter capable of emitting light in response to external pump light. The security feature also contains a second component in the form of a taggant that absorbs light in a spectrally narrow range compared to the broader excitation spectrum of the first material. In this manner the emitter and taggant work in combination with one another to create an emission response significantly dependent on the illumination wavelengths and unique to the specific combination of the components. The emitter and taggant can be in the form of a mixture. Further the emitter and taggant may be applied in close proximity to one another, such as within two separate coating layers on a suitable substrate.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: September 23, 2014
    Assignee: Spectra Systems Corporation
    Inventors: Nabil Lawandy, Andrei Smuk, Leif Olson, Charles Zepp
  • Publication number: 20130182241
    Abstract: A system and method for authentication of secure products is disclosed. The security feature contains a first component in the form of an emitter capable of emitting light in response to external pump light. The security feature also contains a second component in the form of a taggant that absorbs light in a spectrally narrow range compared to the broader excitation spectrum of the first material. In this manner the emitter and taggant work in combination with one another to create an emission response significantly dependent on the illumination wavelengths and unique to the specific combination of the components. The emitter and taggant can be in the form of a mixture. Further the emitter and taggant may be applied in close proximity to one another, such as within two separate coating layers on a suitable substrate.
    Type: Application
    Filed: January 18, 2012
    Publication date: July 18, 2013
    Applicant: SPECTRA SYSTEMS CORPORATION
    Inventors: Nabil Lawandy, Andrei Smuk, Leif Olson, Charles Zepp
  • Patent number: 8470861
    Abstract: The present invention is a mitochondria-targeted antioxidant prodrug useful for the prevention or treatment of diseases or conditions associated with mitochondrial dysfunction resulting from changes in the mitochondrial redox environment. Antioxidant prodrugs of the invention are produced by modifying an antioxidant to a fatty acid so that the resulting prodrug is targeted to and activated by an enzyme of mitochondrial fatty acid beta-oxidation.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: June 25, 2013
    Assignee: University of Rochester
    Inventors: Marion W. Anders, James L. Robotham, Shey-Shing Sheu, Paul Spencer Brookes, Jalil Shojaie, Leif Olson, Richard L. Parton
  • Publication number: 20100168198
    Abstract: The present invention is a mitochondria-targeted antioxidant prodrug useful for the prevention or treatment of diseases or conditions associated with mitochondrial dysfunction resulting from changes in the mitochondrial redox environment. Antioxidant prodrugs of the invention are produced by modifying an antioxidant to a fatty acid so that the resulting prodrug is targeted to and activated by an enzyme of mitochondrial fatty acid beta-oxidation.
    Type: Application
    Filed: January 27, 2010
    Publication date: July 1, 2010
    Inventors: Marion W. Anders, James L. Robotham, Shey-Shing Sheu, Paul Spencer Brookes, Jalil Shojaie, Leif Olson, Richard L. Parton
  • Publication number: 20070015660
    Abstract: Non-photosensitive direct thermographic materials comprise a reducing agent that is a catechol borate compound. These compounds can reduce silver(I) ion to metallic silver to produce a dense black silver image under the short time and high temperature conditions that occur when using thermal print-heads during direct thermal printing.
    Type: Application
    Filed: July 18, 2005
    Publication date: January 18, 2007
    Inventors: Kumars Sakizadeh, Peter Cowdery-Corvan, Leif Olson, David Whitcomb
  • Publication number: 20060141402
    Abstract: Black-and-white, aqueous-based, silver halide-containing photothermographic materials have increased stability both prior to use and after imaging with the incorporation of at least 0.005 g/m2 of a tetrafluoroborate salt.
    Type: Application
    Filed: December 29, 2004
    Publication date: June 29, 2006
    Inventors: Sharon Simpson, Kumars Sakizadeh, Leif Olson
  • Publication number: 20060128566
    Abstract: Non-photosensitive direct thermographic materials comprise a reducing agent that is a specific ortho-amino-phenol, para-amino-phenol, or hydroquinone compound. These compounds can reduce silver(I) ion to metallic silver to produce a dense black silver image under the short time and high temperature conditions that occur when using thermal print-heads during direct thermal printing. The materials are characterized by their calculated aqueous deprotonation and their calculated anion HOMO energies.
    Type: Application
    Filed: December 15, 2004
    Publication date: June 15, 2006
    Inventors: David Whitcomb, Leif Olson, Peter Cowdery-Corvan, Kumars Sakizadeh, Takuzo Ishida
  • Publication number: 20060093970
    Abstract: The present invention relates to a developer for photographic materials comprising at least one antioxidant and at least one polyvalent metal ion sequestrant, wherein the developer has reduced malodor.
    Type: Application
    Filed: November 3, 2004
    Publication date: May 4, 2006
    Inventors: Leif Olson, Shirleyanne Haye
  • Publication number: 20050244762
    Abstract: The present invention relates to a method for reducing sensitizing dye stain comprising the steps of providing an exposed sensitized imaging element comprising a support having thereon at least one imaging layer comprising at least one sensitized emulsion and at least one dye dispersion comprising dye and a water soluble dye stain reducing surfactant and processing the exposed sensitized imaging element in a developing solution essentially free of dye washout agent.
    Type: Application
    Filed: May 3, 2004
    Publication date: November 3, 2005
    Inventors: Leif Olson, Kurt Schroeder