Granted Patent
Utility
US 6,492,549 · App. 09/753,150
Process for preparing alkylene diamine triacetic acid
Inventors:
Marcellinus Alexander Van Doorn, Johannes Wilhelmus Driessen, Tjerk Oedse Boonstra, Martin Heus
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Jan 2, 2001
Inventors
Marcellinus Alexander Van Doorn
Johannes Wilhelmus Driessen
Tjerk Oedse Boonstra
Martin Heus
Assignee (at issue)
Akzo Novel NV
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.