IP Library › Granted Patent US 4,294,948
Granted Patent Utility
US 4,294,948 · App. 06/084,317

Process for preparing olefin polymers or copolymers, and catalyst for use in said process

Inventors: Akinori Toyota, Ken Yoshitugu, Norio Kashiwa
Patented Case View Patent ↗
Granted: Oct 13, 1981 Filed: Oct 12, 1979
Inventors
Akinori Toyota
Ken Yoshitugu
Norio Kashiwa
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.

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 4,294,948
App. No.
06/084,317
Filed
1979-10-12
Granted
1981-10-13
Kind
A