Granted Patent
Utility
US 6,458,756 · App. 09/593,841
Powder detergent process
Inventors:
William M. Karpusiewicz, Roy Dennis Ray, Philip Glassman
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: Jun 14, 2000
Inventors
William M. Karpusiewicz
Roy Dennis Ray
Philip Glassman
Assignee (at issue)
Unilever Home & Personal Care USA, Division of Conopco, 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.