Patents by Inventor David H. B. Ripin

David H. B. Ripin 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).

  • 3-Amino-piperidine derivatives and methods of manufacture
    Patent number: 7084277
    Abstract: This invention relates to 3-amino piperidine derivatives, their intermediates and methods of manufacture. As such, the present invention includes methods of making a compound of the formulas (Ia) and (Ib) wherein R1, R2, R3, R4, R14, and n are herein defined. The present invention also relates to the compounds used in such processes, as well as the compounds made by the processes.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: August 1, 2006
    Assignee: Pfizer Inc.
    Inventor: David H. B. Ripin
  • Crystal forms of 2-(3-difluoromethyl-5-phenyl-pyrazol-1-yl)-5-methanesulfonyl pyridine
    Publication number: 20040266832
    Abstract: The invention concerns crystalline forms of 2-(3-difluromethyl-5-phenyl-pyrazol-1-yl)-5-methanesulfonyl-pyridine, their preparation and use in pharmaceuticals.
    Type: Application
    Filed: June 24, 2004
    Publication date: December 30, 2004
    Inventors: Zheng J. Li, Robert J. Rafka, David H. B. Ripin, Michael J. Castaldi
  • 3-Amino-piperadine derivatives and methods of manufacture
    Publication number: 20040102627
    Abstract: This invention relates to 3-amino piperadine derivatives, their intermediates and methods of manufacture.
    Type: Application
    Filed: November 20, 2003
    Publication date: May 27, 2004
    Applicant: Pfizer Inc.
    Inventor: David H.B. Ripin
  • Novel processes and intermediates for preparing triazolo-pyridines
    Publication number: 20040053959
    Abstract: The present invention relates and intermediates to a novel process for preparing triazolo-pyridines of the formula I 1
    Type: Application
    Filed: August 27, 2003
    Publication date: March 18, 2004
    Applicant: Pfizer Inc.
    Inventors: Richard A. Buzon, Michael J. Castaldi, Zhengong B. Li, David H. B. Ripin, Yong Tao
  • Synthesis of carbamate ketolide antibiotics
    Patent number: 6403776
    Abstract: The invention relates to a method of preparing a macrolide antibiotic of the formula wherein R1, R2, R3, R4, R5 are defined above. These antibiotics are useful as antibacterial and antiprotozoal agents in mammals, including man, as well as in fish and birds. The invention also includes novel compounds made by the preparation of the macrolide antibiotic.
    Type: Grant
    Filed: July 5, 2000
    Date of Patent: June 11, 2002
    Assignee: Pfizer Inc.
    Inventors: David H. B. Ripin, Brian C. Vanderplas, Takushi Kaneko, William T. McMillen, Robert W. McLaughlin