Patents by Inventor Chi Woo

Chi Woo 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).

  • Process for the preparation of clindamycin phosphate
    Patent number: 4895934
    Abstract: A method for the preparation of clindamycin phosphate by first preparing the novel intermediate, clindamycin phosphoryl benzylate. The method can be used to make other, structurally related compounds.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: January 23, 1990
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: William L. Matier, Chi Woo, Ying-Chi Lee
  • Clindamycin-2-phosphoryl benzylate
    Patent number: 4849515
    Abstract: A novel compound, also known as 7(s)-chloro-7-deoxylincomycin-2-phosphoryl benzylate, useful an an intermediate in the production of the antibiotic, clindamycin-2-phosphate.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: July 18, 1989
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: William L. Matier, Chi Woo, Ying-Chi Lee
  • Ethylenediamine derivatives of aryloxypropanolamine aryl esters having various medicinal properties
    Patent number: 4556668
    Abstract: Described herein are compounds of the formula ##STR1## wherein R.sub.1 is alkyl of from 1 to about 5 carbon atoms, alkenyl of from 2 to about 5 carbon atoms, alkynyl of from 3 to about 5 carbon atoms, cycloalkyl of from 3 to about 7 carbon atoms, alkylcarboxymethyl wherein the alkyl portion is from 1 to about 5 carbon atoms, arylcarboxymethyl wherein the aryl portion is from 6 to about 10 carbon atoms, aryl of from 6 to about 10 carbon atoms, or aralkyl wherein the alkyl portion is from 1 to about 5 carbon atoms and the aryl portion is from about 6 to about 10 carbon atoms; R.sub.2 and R.sub.
    Type: Grant
    Filed: July 15, 1983
    Date of Patent: December 3, 1985
    Assignee: American Hospital Supply Corporation
    Inventors: Paul W. Erhardt, Chi Woo