Granted Patent
Utility
US 6,328,816 · App. 09/000,297
Composition and method for degreasing metal surfaces
Inventors:
Lawrence R. Carlson, John R. Pierce
Patented Case
View Patent ↗
Granted: Dec 11, 2001
Filed: Jan 26, 1998
Inventors
Lawrence R. Carlson
John R. Pierce
Assignee (at issue)
Henkel Limited
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.