IP Library › Granted Patent US 4,605,940
Granted Patent Utility
US 4,605,940 · App. 06/653,010

Thermoresponsive recording paper sheet

Inventors: Ryoichi Kinishi, Eisaburo Kaku, Naoki Hanayama
Patented Case View Patent ↗
Granted: Aug 12, 1986 Filed: Sep 11, 1984
Inventors
Ryoichi Kinishi
Eisaburo Kaku
Naoki Hanayama
Assignee (at issue)
Yoshitomi Pharmaceutical 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 4,605,940
App. No.
06/653,010
Filed
1984-09-11
Granted
1986-08-12
Kind
A