Granted Patent
Utility
US 5,391,549 · App. 08/029,431
Cinnoline-3-carboxylic acid derivatives
Inventors:
Akira Maruyama, Shigeru Ogawa, Satoshi Yamazaki, Akihiro Tobe
Patented Case
View Patent ↗
Granted: Feb 21, 1995
Filed: Mar 10, 1993
Inventors
Akira Maruyama
Shigeru Ogawa
Satoshi Yamazaki
Akihiro Tobe
Assignee (at issue)
Mitsubishi Kasei 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.