Granted Patent
Utility
US 6,096,921 · App. 09/388,274
O-amino(thio)phenolcarboxylic acids, and their preparation
Inventors:
Recai Sezi, Michael Keitmann
Patented Case
View Patent ↗
Granted: Aug 1, 2000
Filed: Sep 1, 1999
Inventors
Recai Sezi
Michael Keitmann
Assignee (at issue)
Siemens 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.