Granted Patent
Utility
US 5,622,928 · App. 08/593,535
Glia activation factor and its production
Inventors:
Ken-ichi Naruo, Chisako Seko, Tsutomu Kurokawa, Tatsuya Kondo
Patented Case
View Patent ↗
Granted: Apr 22, 1997
Filed: Jan 24, 1996
Inventors
Ken-ichi Naruo
Chisako Seko
Tsutomu Kurokawa
Tatsuya Kondo
Assignee (at issue)
Takeda 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.