Granted Patent
Utility
US 6,344,572 · App. 09/647,340
Processes for the preparation of threo-1,2-epoxy-3-amino-4-phenylbutane derivatives
Inventors:
Katsuji Maehara, Yukinori Tokuda, Hiroshi Murao, Yasuyoshi Ueda
Patented Case
View Patent ↗
Granted: Feb 5, 2002
Filed: Nov 17, 2000
Inventors
Katsuji Maehara
Yukinori Tokuda
Hiroshi Murao
Yasuyoshi Ueda
Assignee (at issue)
KANEKA CORPORATION
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.