Granted Patent
Utility
US 5,173,425 · App. 07/289,738
Enhancement of naphthalene dioxygenase activity during microbial indigo production
Inventors:
Cuneyt M. Serdar, Douglas C. Murdock, Burt D. Ensley
Patented Case
View Patent ↗
Granted: Dec 22, 1992
Filed: Aug 4, 1989
Inventors
Cuneyt M. Serdar
Douglas C. Murdock
Burt D. Ensley
Assignee (at issue)
Amgen Inc.
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.