Patents by Inventor Bingwei V. Yang

Bingwei V. Yang 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"-desmethoxy derivatives of erythromycin and azithromycin
    Patent number: 5441939
    Abstract: A compound having the formula ##STR1## wherein Z is CH.sub.2 --N(CH.sub.3), N(CH.sub.3)--CH.sub.2, or ##STR2## R.sup.1 and R.sup.2 are selected from 1) one of R.sup.1 and R.sup.2 is OH and the other of R.sup.1 and R.sup.2 is (C.sub.1 -C.sub.6)alkyl, (C.sub.2 -C.sub.6)alkenyl, or phenyl, with the proviso that Z is not CO;2) one of R.sup.1 and R.sup.2 is H and the other of R.sup.1 and R.sup.2 is NR.sup.5 R.sup.6 wherein R.sup.5 and R.sup.6 are independently selected from H and (C.sub.1 -C.sub.6)alkyl, or is OR.sup.7 wherein R.sup.7 is H or (C.sub.1 -C.sub.6)alkyl; and3) R.sup.1 and R.sup.2 together form an oxo or oxime group;R.sup.3 and R.sup.4 are each hydroxyl or together form a carbonate or thiocarbonate group; and pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: August 15, 1995
    Assignee: Pfizer Inc.
    Inventor: Bingwei V. Yang
  • Azaspiro quinolone antibacterial agents
    Patent number: 5407943
    Abstract: Quinolone carboxylic acids of the formula ##STR1## wherein R.sup.1, R.sup.2, A and Y are as defined herein, and R.sup.3 is ##STR2## have antibacterial properties.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: April 18, 1995
    Assignee: Pfizer Inc.
    Inventor: Bingwei V. Yang