Granted Patent
Utility
US 4,914,020 · App. 06/824,450
Multi-layer analytical element with preserved enzyme containing spreading layer
Inventors:
Kazumi Arai, Mikio Koyama, Morio Kobayashi, Kenichiro Okaniwa, Takasi Momose, Kunihiro Furukawa, Souichi Zanma
Patented Case
View Patent ↗
Granted: Apr 3, 1990
Filed: Jan 31, 1986
Inventors
Kazumi Arai
Mikio Koyama
Morio Kobayashi
Kenichiro Okaniwa
Takasi Momose
Kunihiro Furukawa
Souichi Zanma
Assignees (at issue)
Konishiroku Photo Industry Co., Ltd.
CHUGAI SEIYAKU KABUSHIKI KAISHA
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.