Granted Patent
Utility
US 4,470,935 · App. 06/452,215
Process for producing microcapsules containing hydrophobic core material for carbonless duplicating sheets
Inventors:
Setsuya Egawa, Sakamoto Masahiro
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Dec 22, 1982
Inventors
Setsuya Egawa
Sakamoto Masahiro
Assignee (at issue)
Jujo Paper 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.