Granted Patent
Utility
US 4,883,607 · App. 07/147,943
Water-insoluble silicate containing detergent builder granulate
Inventor:
Manfred Diehl
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Jan 25, 1988
Inventor
Manfred Diehl
Assignee (at issue)
Degussa AG
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.