Granted Patent
Utility
US 5,973,151 · App. 09/032,081
Aromatic condensation compounds useful as optically active building blocks
Inventors:
Yasutaka Tanaka, Akemi Sekita, Hiroshi Suzuki, Akiyoshi Torii
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Feb 27, 1998
Inventors
Yasutaka Tanaka
Akemi Sekita
Hiroshi Suzuki
Akiyoshi Torii
Assignee (at issue)
Japan Science and Technology
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.