Granted Patent
Utility
US 4,264,447 · App. 06/052,445
Ultrafiltration membrane assembly and bonding process therefor
Inventor:
Robert D. Nicolet
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Jun 26, 1979
Inventor
Robert D. Nicolet
Assignee (at issue)
Dorr-Oliver 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.