Granted Patent
Utility
US 4,519,986 · App. 06/343,637
Process for preparation of ultrapure thorium fluoride
Inventors:
Ricardo C. Pastor, Remedios K. Chew
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Jan 28, 1982
Inventors
Ricardo C. Pastor
Remedios K. Chew
Assignee (at issue)
Hughes Aircraft Company
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.