Granted Patent
Utility
US 4,230,547 · App. 05/848,248
Method for separating krypton isotopes
Inventor:
John T. Porter, II
Patented Case
View Patent ↗
Granted: Oct 28, 1980
Filed: Nov 3, 1977
Inventor
John T. Porter, II
Assignee (at issue)
General Atomics
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.