Granted Patent
Utility
US 4,917,982 · App. 07/147,025
Toner for use in developing electrostatic images containing polypropylene
Inventors:
Makoto Tomono, Noriyoshi Tarumi, Masayuki Sato
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Jan 19, 1988
Inventors
Makoto Tomono
Noriyoshi Tarumi
Masayuki Sato
Assignee (at issue)
Konishiroku Photo Industry 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.