Patents by Inventor Guari Sankar Lal

Guari Sankar Lal 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).

  • Pentafluorosulfanyl-substituted thienothiophene monomers and conducting polymers
    Patent number: 7241904
    Abstract: Disclosed are monomers of the formula:
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: July 10, 2007
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Steffen Zahn, Andrew Francis Nordquist, Kristen Elaine Minnich, Guari Sankar Lal, William Franklin Burgoyne, Jr., Axel Klauck-Jacobs
  • Pentafluorosulfanyl-substituted thienothiophene monomers and conducting polymers
    Patent number: 7060846
    Abstract: Thienothiophene monomers having an SF5 group and conducting oligomers and polymers formed by the polymerization of such monomers and their use as hole injection materials, charge transport materials, or as semiconductors. The compound may be of the formula: where X and X? are independently H, halogen atoms (e.g., F, Cl, Br, and I), MgCl, MgBr, Mgl, Sn(R?)3, where R? comprises C1-6 alkyl or —OC1-6 alkyl, boronic acid, boronic ester, —CH?CHR? (where R? comprises H or C1-6 alkyl), —OC1-6 alkyl, —COOC1-6 alkyl, —S—COR?? and —COR?? (where R?? comprises H or C1-6 alkyl), —C?CH, or polymerizable aromatic rings (such as phenyl, naphthalene, pyrrole, dithiophene, thienothiophene, thiophene and so forth).
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: June 13, 2006
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Steffen Zahn, Andrew Francis Nordquist, Kristen Elaine Minnich, Guari Sankar Lal, William Franklin Burgoyne, Jr., Axel Klauck-Jacobs