Granted Patent
Utility
US 6,761,832 · App. 09/499,363
Process for the production of dithiophosphoric acid polysulfide mixtures
Inventors:
Ludger Heiliger, Alfred Pauli, Joachim Hegmann, Clemens Schudok, Thomas Früh
Patented Case
View Patent ↗
Granted: Jul 13, 2004
Filed: Feb 10, 2000
Inventors
Ludger Heiliger
Alfred Pauli
Joachim Hegmann
Clemens Schudok
Thomas Früh
Assignee (at issue)
Rhein Chemie Rheinau GmbH
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.