Patents by Inventor Nigel Birdsall

Nigel Birdsall 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).

  • Heterocyclic compounds, their preparation and their therapeutic use
    Patent number: 5877199
    Abstract: A compound of formula (I): ##STR1## wherein Y.sup.1, Y.sup.2, Y.sup.3 and Y.sup.4 are each hydrogen, halogen, nitro, cyano, hydroxyl, thiol, amino, alkyl, haloalkyl, alkylthio, a protected or unprotected carboxyl, a protected or unprotected sulfonamide, or tetrazol; one of R.sup.1 and R.sup.2 is hydrogen, alkyl, aryl, aralkyl, oxazolyl, or a protected or unprotected carboxyl and the other of R.sup.1 and R.sup.2 is hydrogen, alkyl, aryl or aralkyl; and R.sup.3 is hydrogen or an amino protecting group, and pharmaceutically acceptable salts or esters thereof. The compounds are effective for treating dementia, Alzheimer's disease and delirium and are effective as sedatives.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: March 2, 1999
    Assignee: Sankyo Company, Limited
    Inventors: Nigel Birdsall, Sebastian Lazareno, Syunji Naruto, Masahiko Sugimoto, Kazuo Koyama, Shinji Marumoto