Granted Patent
Utility
US 5,041,464 · App. 07/457,078
Process for preparing polymer emulsion particles having pores
Inventors:
Futoshi Hoshino, Takeshi Yanagihara, Makoto Nakano
Patented Case
View Patent ↗
Granted: Aug 20, 1991
Filed: Dec 26, 1989
Inventors
Futoshi Hoshino
Takeshi Yanagihara
Makoto Nakano
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.