Granted Patent
Utility
US 5,455,341 · App. 08/160,709
Highly substituted carboxymethyl sulfoethyl cellulose ethers (CMSEC), a process for their production and their use in textile printing
Inventors:
Rene Kiesewetter, Reinhard Kniewske, Eugen Reinhardt, Klaus Szablikowski
Patented Case
View Patent ↗
Granted: Oct 3, 1995
Filed: Dec 1, 1993
Inventors
Rene Kiesewetter
Reinhard Kniewske
Eugen Reinhardt
Klaus Szablikowski
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.