Granted Patent
Utility
US 4,448,885 · App. 06/257,963
Bacillus thuringiensis crystal protein in Escherichia coli
Inventors:
H. Ernest Schnepf, Helen R. Whiteley
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Apr 27, 1981
Inventors
H. Ernest Schnepf
Helen R. Whiteley
Assignee (at issue)
The Board of Regents of the University of Washington
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.