Patents by Inventor Otto Halpern

Otto Halpern 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).

  • 9-substituted porphycenes
    Patent number: 5637608
    Abstract: Novel 9-substituted porphycene compounds are useful in photodynamic therapy.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: June 10, 1997
    Assignee: Cytopharm, Inc.
    Inventors: Emanuel Vogel, Martin Mueller, Otto Halpern, Alexander D. Cross
  • 9-Substituted porphycenes
    Patent number: 5610175
    Abstract: Porphycene compounds having the formula ##STR1## wherein each R is --(CH.sub.2).sub.n --X, n=1-10, X is OR.sup.1 and R.sup.1 is alkyl, aralkyl or aryl are useful as photosensitizer compounds in photodynamic therapy.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: March 11, 1997
    Assignee: Cytopharm, Inc.
    Inventors: Emanuel Vogel, Martin Mueller, Otto Halpern, Alexander D. Cross
  • 6,11-Dihydrodibenzo-[b.e.]-thiepin-11-one-3-carboxaldehyde
    Patent number: 4051148
    Abstract: This invention relates to a novel method for the preparation of 6,11-dihydrodibenzo-[b.e.]-thiepin-11-one-3-acetic acid and the novel intermediate 6,11-dihydrodibenzo-[b.e.]-thiepin-11-one-3-carboxaldehyde used in the preparation thereof.
    Type: Grant
    Filed: June 18, 1976
    Date of Patent: September 27, 1977
    Assignee: Syntex (U.S.A.) Inc.
    Inventors: Anthony Prince, Otto Halpern, Jack Ackrell