Granted Patent
Utility
US 4,789,272 · App. 07/026,937
Transportation method of synthetic rubber chips
Inventors:
Tetsuyuki Matsubara, Norifumi Ito, Mune Iwamoto, Toshihiko Ando
Patented Case
View Patent ↗
Granted: Dec 6, 1988
Filed: Mar 17, 1987
Inventors
Tetsuyuki Matsubara
Norifumi Ito
Mune Iwamoto
Toshihiko Ando
Assignees (at issue)
Mitsui Toatsu Chemicals, Incorporated
TOYO ENGINEERING 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.