Patents by Inventor Leo Letendre

Leo Letendre 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).

  • Publication number: 20080027237
    Abstract: Multiple novel reaction schemes, novel process steps and novel intermediates are provided for the synthesis of 9,11-epoxy steroids.
    Type: Application
    Filed: March 27, 2006
    Publication date: January 31, 2008
    Inventors: John Ng, Chin Liu, Dennis Anderson, Jon Lawson, Joseph Wieczorek, Sastry Kunda, Leo Letendre, Mark Pozzo, Yuen-Lung Sing, Ping Wang, Edward Yonan, Richard Weier, Thomas Kowar, Julio Baez, Bernhard Erb
  • Publication number: 20070060746
    Abstract: Multiple novel reaction schemes, novel process steps and novel intermediates are provided for the synthesis of epoxymexrenone and other compounds of Formula I wherein: -A-A- represents the group —CHR4—CHR5— or —CR4?CR5— —R3, R4 and R5 are independently selected from the group consisting of hydrogen, halo, hydroxy, lower alkyl, lower alkoxy, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, cyano, aryloxy, R1 represents an alpha-oriented lower alkoxycarbonyl or hydroxyalkyl radical, —B—B— represents the group —CHR6—CHR7— or an alpha- or beta-oriented group: where R6 and R7 are independently selected from the group consisting of hydrogen, halo, lower alkoxy, acyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, alkyl, alkoxycarbonyl, acyloxyalkyl, cyano, aryloxy, and R8 and R9 are independently selected from the group consisting of hydrogen, halo, lower alkoxy, acyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, alkyl, alkoxycarbonyl, acyloxyalkyl, cyano, aryloxy, or R8 and R9 together comprise a carbocyclic
    Type: Application
    Filed: July 21, 2006
    Publication date: March 15, 2007
    Inventors: John Ng, Ping Wang, Julio Baez, Chin Liu, Dennis Anderson, Jon Lawson, Bernhard Erb, Joseph Wieczorek, Gennaro Mucciariello, Fortunato Vanzanella, Sastry Kunda, Leo Letendre, Mark Pozzo, Yuen-Lung Sing, Edward Yonan
  • Publication number: 20070004924
    Abstract: A process for the qualitative preparation of 3-haloalkyl-1H-pyrazoles suitable for efficient, high payload commercial application.
    Type: Application
    Filed: September 7, 2006
    Publication date: January 4, 2007
    Inventors: Leo Letendre, William McGhee, Cynthia Snoddy, George Klemm, Henry Graud
  • Publication number: 20050256094
    Abstract: Intermediates in the preparation of 9,11-epoxy steroids are disclosed. Particularly, disclosed are 11,12-epoxy steroid, 4,5-9,11-diepoxy steroid and 12-keto steroid intermediates.
    Type: Application
    Filed: February 7, 2005
    Publication date: November 17, 2005
    Applicant: G. D. Searle & Company
    Inventors: John Ng, Chin Liu, Dennis Anderson, Jon Lawson, Joseph Wieczorek, Sastry Kunda, Leo Letendre, Mark Pozzo, Yuen-Lung Sing, Ping Wang, Edward Yonan, Richard Weir, Thomas Kowar, Julio Baez, Bernhard Erb
  • Publication number: 20050239761
    Abstract: Novel 9?-hydroxy steroid compounds, including compounds of Formula IX wherein -A-A-, —B—B—, R1, R3, R8 and R9 are as defined in the specification.
    Type: Application
    Filed: June 20, 2005
    Publication date: October 27, 2005
    Inventors: John Ng, Ping Wang, Julio Baez, Chin Liu, Dennis Anderson, Jon Lawson, Bernhard Erb, Joseph Wieczorek, Gennaro Mucciariello, Fortunato Vanzanella, Sastry Kunda, Leo Letendre, Mark Pozzo, Yuen-Lung Sing, Edward Yonan