Granted Patent
Utility
US 4,629,800 · App. 06/706,885
Fluoran compounds
Inventors:
Naoki Yonese, Masayuki Omatsu, Mitsuru Kondo
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: Mar 1, 1985
Inventors
Naoki Yonese
Masayuki Omatsu
Mitsuru Kondo
Assignee (at issue)
Kanzaki Paper Manufacturing Co., 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.