IP Library › Granted Patent US 4,834,819
Granted Patent Utility
US 4,834,819 · App. 07/230,974

Process for producing information recording discs

Inventors: Akira Todo, Toshio Kimura, Masayoshi Kurisu
Patented Case View Patent ↗
Granted: May 30, 1989 Filed: Aug 11, 1988
Inventors
Akira Todo
Toshio Kimura
Masayoshi Kurisu
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 4,834,819
App. No.
07/230,974
Filed
1988-08-11
Granted
1989-05-30
Kind
A