Granted Patent
Utility
US 4,885,249 · App. 06/678,578
Aspergillus niger transformation system
Inventors:
Franics P. Buxton, David I. Gwynne, Roger W. Davies
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Dec 5, 1984
Inventors
Franics P. Buxton
David I. Gwynne
Roger W. Davies
Assignee (at issue)
Allelix 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.