Granted Patent
Utility
US 4,562,272 · App. 06/248,268
Process for preparing cyclic polyethers
Inventors:
Arnold M. Harrison, Leonard Kaplan
Patented Case
View Patent ↗
Granted: Dec 31, 1985
Filed: Mar 27, 1981
Inventors
Arnold M. Harrison
Leonard Kaplan
Assignee (at issue)
Union Carbide 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.