Granted Patent
Utility
US 5,160,503 · App. 07/436,142
Water-soluble blends of active methylene compounds and polyhydric alcohols as formaldehyde scavengers
Inventor:
Richard D. Smith
Patented Case
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Granted: Nov 3, 1992
Filed: Nov 13, 1989
Inventor
Richard D. Smith
Assignee (at issue)
West Point Pepperell
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.