Granted Patent
Utility
US 6,649,136 · App. 09/819,948
Method of cyanide salt production
Inventors:
Michael F. Ray, Marcus Rajchel
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Mar 27, 2001
Inventors
Michael F. Ray
Marcus Rajchel
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.