Granted Patent
Utility
US 6,237,809 · App. 09/429,629
Container for high purity liquid chemicals
Inventors:
Keiji Kawai, Yoshiaki Ito, Yasuyuki Nakamura
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Oct 29, 1999
Inventors
Keiji Kawai
Yoshiaki Ito
Yasuyuki Nakamura
Assignee (at issue)
AICELLO 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.