Granted Patent
Utility
US 4,382,875 · App. 06/364,009
Extraction treatment
Inventor:
Frank Solomon
Patented Case
View Patent ↗
Granted: May 10, 1983
Filed: Mar 31, 1982
Inventor
Frank Solomon
Assignee (at issue)
Diamond Shamrock 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.