Granted Patent
Utility
US 4,543,365 · App. 06/694,276
Method for increasing the porosity of a cross-linked copolymer
Inventors:
Takaharu Itagaki, Tsuyoshi Ito, Kiyoto Ando, Hiromi Teshima
Patented Case
View Patent ↗
Granted: Sep 24, 1985
Filed: Jan 24, 1985
Inventors
Takaharu Itagaki
Tsuyoshi Ito
Kiyoto Ando
Hiromi Teshima
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.