Patents by Inventor Arnold A. Liebman

Arnold A. Liebman 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).

  • Radiolabeled benzazepine
    Patent number: 4869895
    Abstract: A compound of the formula: ##STR1## wherein T is tritium; is described as well as intermediates for its preparation. The compound of formula I is useful in vivo for detecting the presence of benzodiazepine receptor occupiers in a warmblooded animal.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: September 26, 1989
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Walter Burger, Arnold A. Liebman, Clark W. Berry
  • Radiolabeled benzazepine
    Patent number: 4820835
    Abstract: A compound of the formula: ##STR1## wherein T is tritium; is described as well as intermediates for its preparation. The compound of formula I is useful in an assay for detecting the presence of benzodiazepine receptor occupiers in a warmblooded animal.
    Type: Grant
    Filed: June 30, 1986
    Date of Patent: April 11, 1989
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Walter Burger, Arnold A. Liebman, Clark W. Perry
  • 6-Hydroxy-7-methoxy-5-benzofuran carboxaldehyde and 2,3-dihydro-7-methoxy-6-benzofuranol
    Patent number: 4150042
    Abstract: The invention relates to synthetic processes to produce the known pharmacologically active 9-methoxypsoralen. Also disclosed are various novel intermediates utilized in these processes.
    Type: Grant
    Filed: March 8, 1978
    Date of Patent: April 17, 1979
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Arnold A. Liebman, Yu-Ying Liu
  • Process to produce 8-methoxypsoralen
    Patent number: 4147703
    Abstract: The invention relates to synthetic processes to produce the known pharmacologically active 9-methoxypsoralen. Also disclosed are various novel intermediates utilized in these processes.
    Type: Grant
    Filed: March 8, 1978
    Date of Patent: April 3, 1979
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Arnold A. Liebman, Yu-Ying Liu
  • 7-Oxo-9-methoxy-7H-furo[3,2-g][1]benzopyran-6-carboxylic acid
    Patent number: 4107182
    Abstract: The invention relates to synthetic processes to produce the known pharmacologically active 9-methoxypsoralen. Also disclosed are various novel intermediates utilized in these processes.
    Type: Grant
    Filed: July 29, 1977
    Date of Patent: August 15, 1978
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Arnold A. Liebman, Yu-Ying Liu