Granted Patent
Utility
US 5,183,749 · App. 07/496,183
Microbial process for the preparation of milbemycin derivatives
Inventors:
Gerado Ramos, Oreste Ghisalba, Hans-Peter Schar, Bruno Frei, Peter Maienfisch, Anthony Cornelius O'Sullivan
Patented Case
View Patent ↗
Granted: Feb 2, 1993
Filed: Mar 20, 1990
Inventors
Gerado Ramos
Oreste Ghisalba
Hans-Peter Schar
Bruno Frei
Peter Maienfisch
Anthony Cornelius O'Sullivan
Assignee (at issue)
Sankyo Holdings Co., Ltd.
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.