Granted Patent
Utility
US 4,950,740 · App. 07/164,522
Recombinant diphtheria vaccines
Inventors:
Lawrence Greenfield, Anne W. Emerick, Walter J. Laird
Patented Case
View Patent ↗
Granted: Aug 21, 1990
Filed: Mar 7, 1988
Inventors
Lawrence Greenfield
Anne W. Emerick
Walter J. Laird
Assignee (at issue)
Cetus Corporation
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.