IP Library Granted Patent US 4,011,382
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,011,382
App. No.
05/557,122
Filed
1975-03-10
Granted
1977-03-08
Kind
A