Patents by Inventor David Leitch

David Leitch 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: 12123194
    Abstract: A first plurality of roofing shingles installed in a first plurality of rows on a roof deck, and a second plurality of roofing shingles installed in a second plurality of rows. An edge of one of the second roofing shingles in each of the second rows is offset from the edge of another one of the second roofing shingles in another adjacent one of the second rows. An edge of a first photovoltaic shingle is juxtaposed with the edge of a first roofing shingle of the second roofing shingles in a first row of the second rows. The edge of at least another photovoltaic shingle in at least one of another row of the second rows is substantially aligned with the edge of the first photovoltaic shingle. An additional roofing shingle is installed intermediate one of the second roofing shingles and one of the photovoltaic shingles.
    Type: Grant
    Filed: September 12, 2022
    Date of Patent: October 22, 2024
    Assignee: GAF Energy LLC
    Inventors: Michael David Kuiper, Evan Michael Wray, Daniel East, Olan T. Leitch, Ming-Liang Shiao
  • Publication number: 20240326030
    Abstract: Disclosed herein are embodiments of a Pd(0) precursor complex and embodiments of phosphorus-based Pd(0) catalysts formed therefrom. Also disclosed are method embodiments for making the Pd(0) precursor complex and the phosphorus-based Pd(0) catalysts. The Pd(0) precursor complex can be used to generate, in situ, the phosphorus-based Pd(0) catalysts, in various different types of palladium-mediated coupling reactions.
    Type: Application
    Filed: January 11, 2022
    Publication date: October 3, 2024
    Applicant: UVic Industry Partnerships Inc.
    Inventors: David Leitch, Jingjun Huang, Matthew Isaac, Ryan Watt
  • Patent number: 9944572
    Abstract: A method for coupling an alkane with an alkene using a hydrogen transfer catalyst and an alkene dimerization catalyst to form one or more higher molecular weight hydrocarbons.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: April 17, 2018
    Assignee: California Institute of Technology
    Inventors: David Leitch, Jay A. Labinger, John E. Bercaw, Yan Choi Lam
  • Publication number: 20170320792
    Abstract: A method for coupling an alkane with an alkene using a hydrogen transfer catalyst and an alkene dimerization catalyst to form one or more higher molecular weight hydrocarbons.
    Type: Application
    Filed: May 16, 2017
    Publication date: November 9, 2017
    Inventors: David Leitch, Jay A. Labinger, John E. Bercaw, Yan Choi Lam
  • Patent number: 9676680
    Abstract: A method for coupling an alkane with an alkene using a hydrogen transfer catalyst and an alkene dimerization catalyst to form one or more higher molecular weight hydrocarbons.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: June 13, 2017
    Assignee: California Institute of Technology
    Inventors: David Leitch, Jay A. Labinger, John E. Bercaw, Yan Choi Lam
  • Publication number: 20140200376
    Abstract: The disclosure provides for hydrocarbon production by hydrogenation and oligomerizaton and, more particularly, to catalysis of alkanes and alkenes by a tandem transfer hydrogenation and oligomerization.
    Type: Application
    Filed: January 17, 2014
    Publication date: July 17, 2014
    Applicant: California Institute of Technology
    Inventors: David Leitch, Jay A. Labinger, John E. Bercaw, Yan Choi Lam
  • Patent number: 7055805
    Abstract: A self tailing conversion is provided for a standard winch or capstan, particularly a sailboat winch. In one embodiment a self tailer or rope jaw device is secured to the top of the winch drum, and a feeder arm is attached to the stationary center stem of the existing winch. Upward extensions are provided for the stationary center stem and for the driving shaft of the standard winch. Different methods of attachment of the self tailer are described. In a second embodiment a self tailer device is secured below the drum crown of the standard winch, assembled from sections or halves, and a feeder arm is secured to the stationary center stem.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: June 6, 2006
    Inventor: David Leitch
  • Patent number: D686920
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: July 30, 2013
    Assignee: NatureSweet USA, LLC
    Inventors: Mark Cassius, Sean Frisby, David Leitch