Granted Patent
Utility
US 4,919,835 · App. 07/189,934
Powder-coated laundry detergent sheet
Inventors:
Wayne C. Sigl, Frank C. Murray
Patented Case
View Patent ↗
Granted: Apr 24, 1990
Filed: May 3, 1988
Inventors
Wayne C. Sigl
Frank C. Murray
Assignee (at issue)
Kimberly-Clark Inc.
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.