Granted Patent
Utility
US 4,245,396 · App. 06/055,568
Process for drying and granulating sewage sludge
Inventor:
Vere Maffet
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: Jul 9, 1979
Inventor
Vere Maffet
Assignee (at issue)
UOP LLC
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.