Granted Patent
Utility
US 6,174,941 · App. 09/336,079
NH2-modified 6-aminouracils as stabilizers for halogenated polymers
Inventors:
Wolfgang Wehner, Hans-Helmut Friedrich, Rolf Drewes
Patented Case
View Patent ↗
Granted: Jan 16, 2001
Filed: Jun 18, 1999
Inventors
Wolfgang Wehner
Hans-Helmut Friedrich
Rolf Drewes
Assignee (at issue)
Witco Vinyl Additives 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.