IP Library › Granted Patent US 4,695,568
Granted Patent Utility
US 4,695,568 · App. 06/685,768

Thieno[2,3-d]pyrimidine derivatives and salts thereof

Inventors: Kunihiro Ninomiya, Issei Nitta, Akihiro Tobe, Mitsuo Egawa, Ryoji Kikumoto
Patented Case View Patent ↗
Granted: Sep 22, 1987 Filed: Dec 24, 1984
Inventors
Kunihiro Ninomiya
Issei Nitta
Akihiro Tobe
Mitsuo Egawa
Ryoji Kikumoto
Assignee (at issue)
Mitsubishi Chemical 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 4,695,568
App. No.
06/685,768
Filed
1984-12-24
Granted
1987-09-22
Kind
A