Granted Patent
Utility
US 6,797,015 · App. 09/673,944
Method for producing transparent, colored cellulose sleeves
Inventors:
Klaus-Dieter Blumenberg, Willi Neuschulz
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Oct 24, 2000
Inventors
Klaus-Dieter Blumenberg
Willi Neuschulz
Assignee (at issue)
Wolff Walsrode 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.