Granted Patent
Utility
US 4,011,382 · App. 05/557,122
Preparation of low and medium density ethylene polymer in fluid bed reactor
Inventors:
Isaac J. Levine, Frederick J. Karol
Patented Case
View Patent ↗
Granted: Mar 8, 1977
Filed: Mar 10, 1975
Inventors
Isaac J. Levine
Frederick J. Karol
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.