Granted Patent
Utility
US 5,541,284 · App. 08/406,141
Method for processing crude polyoxymethylene
Inventors:
Detlef Arnoldi, Udo Gropp, Edwin Nun
Patented Case
View Patent ↗
Granted: Jul 30, 1996
Filed: Mar 20, 1995
Inventors
Detlef Arnoldi
Udo Gropp
Edwin Nun
Assignee (at issue)
Dequssa AG
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.