Granted Patent
Utility
US 4,292,146 · App. 06/064,615
Porous polyfluoroalkylene sheet useful for separating anolyte from catholyte in electrolytic cells
Inventors:
Eng-Pi Chang, Christine A. Lazarz, Edward H. Cook, Jr.
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Aug 7, 1979
Inventors
Eng-Pi Chang
Christine A. Lazarz
Edward H. Cook, Jr.
Assignee (at issue)
Hooker Chemicals & Plastics Corporation
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.