Granted Patent
Utility
US 4,863,835 · App. 06/439,876
Developer composition for lithographic printing plates
Inventors:
Shigeki Shimizu, Akinobu Oshima, Hiroshi Ide, Noriaki Takahashi
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Nov 8, 1982
Inventors
Shigeki Shimizu
Akinobu Oshima
Hiroshi Ide
Noriaki Takahashi
Assignee (at issue)
Mitsubishi Chemical Industries, 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.