Granted Patent
Utility
US 6,147,042 · App. 09/269,735
Detergent for processes for producing semiconductor devices or producing liquid crystal devices
Inventors:
Takashi Yata, Yutaka Koinuma, Kazunori Fukumura, Yoshihito Fukumura
Patented Case
View Patent ↗
Granted: Nov 14, 2000
Filed: Jul 2, 1999
Inventors
Takashi Yata
Yutaka Koinuma
Kazunori Fukumura
Yoshihito Fukumura
Assignees (at issue)
Kishimoto Sangyo Co., Ltd.
OTSUKA CHEMICAL 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.