Granted Patent
Utility
US 5,873,468 · App. 08/745,837
Thin-plate supporting container with filter means
Inventors:
Kazutoshi Ejima, Yukihiro Hyobu
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: Nov 8, 1996
Inventors
Kazutoshi Ejima
Yukihiro Hyobu
Assignees (at issue)
Sumitomo Sitix Corporation
Kakizaki 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.