Granted Patent
Utility
US 4,808,705 · App. 06/944,347
Stable formulations of ricin toxin a chain and of RTA-immunoconjugates and stabilizer screening methods therefor
Inventor:
Robert Ferris
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Dec 19, 1986
Inventor
Robert Ferris
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.