IP Library Granted Patent US 4,952,649
Granted Patent Utility
US 4,952,649 · App. 07/169,171

Process for producing olefin polymers or copolymers and catalyst components used therefor

Inventors: Mamoru Kioka, Norio Kashiwa
Patented Case View Patent ↗
Granted: Aug 28, 1990 Filed: Mar 11, 1988
Inventors
Mamoru Kioka
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 4,952,649
App. No.
07/169,171
Filed
1988-03-11
Granted
1990-08-28
Kind
A