Granted Patent
Utility
US 4,289,600 · App. 06/064,616
Microporous membrane materials
Inventors:
Christine A. Lazarz, Edward H. Cook, Jr., Lesleigh V. Scripa
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Aug 7, 1979
Inventors
Christine A. Lazarz
Edward H. Cook, Jr.
Lesleigh V. Scripa
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.