Granted Patent
Utility
US 6,720,451 · App. 10/169,842
Method for producing N-methyl-N′-nitroguanidine
Inventors:
Kai van Laak, Wolfram Sirges
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Jul 9, 2002
Inventors
Kai van Laak
Wolfram Sirges
Assignee (at issue)
Bayer Aktiengesellschaft
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.