Granted Patent
Utility
US 4,895,934 · App. 07/328,884
Process for the preparation of clindamycin phosphate
Inventors:
William L. Matier, Chi Woo, Ying-Chi Lee
Patented Case
View Patent ↗
Granted: Jan 23, 1990
Filed: Mar 27, 1989
Inventors
William L. Matier
Chi Woo
Ying-Chi Lee
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.