Granted Patent
Utility
US 4,898,825 · App. 07/043,746
Methods for purification of single-chain and double-chain tissue plasminogen activator
Inventors:
Mitsuyoshi Morii, Masaharu Ohoka, Toshihiko Suzuki, Katsuyuki Suzuki, Nobuhiro Kawashima, Noriko Morii, Kunizo Mori
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Apr 29, 1987
Inventors
Mitsuyoshi Morii
Masaharu Ohoka
Toshihiko Suzuki
Katsuyuki Suzuki
Nobuhiro Kawashima
Noriko Morii
Kunizo Mori
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.