Granted Patent
Utility
US 4,247,642 · App. 05/878,572
Enzyme immobilization with pullulan gel
Inventors:
Hideo Hirohara, Shigeyasu Nabeshima, Masanori Fujimoto, Tsuneyuki Nagase
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Feb 16, 1978
Inventors
Hideo Hirohara
Shigeyasu Nabeshima
Masanori Fujimoto
Tsuneyuki Nagase
Assignee (at issue)
SUMITOMO CHEMICAL COMPANY, LIMITED
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.