IP Library Granted Patent US 4,421,855
Granted Patent Utility
US 4,421,855 · App. 06/292,848

Production of acrylamide using immobilized cells

Inventors: Ichiro Watanabe, Keiichi Sakashita, Yasuo Ogawa
Patented Case View Patent ↗
Granted: Dec 20, 1983 Filed: Aug 14, 1981
Inventors
Ichiro Watanabe
Keiichi Sakashita
Yasuo Ogawa
Assignee (at issue)
Nitto Chemical Industry Co., 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 4,421,855
App. No.
06/292,848
Filed
1981-08-14
Granted
1983-12-20
Kind
A