Granted Patent
Utility
US 5,885,474 · App. 08/011,241
Use of polyaspartic acid amides as leather auxiliary products
Inventors:
Jurgen Reiners, Manfred Schnee, Torsten Groth, Winfried Joentgen, Gerd Schmitz, Harro Traubel, Nikolaus Muller
Patented Case
View Patent ↗
Granted: Mar 23, 1999
Filed: Jan 28, 1998
Inventors
Jurgen Reiners
Manfred Schnee
Torsten Groth
Winfried Joentgen
Gerd Schmitz
Harro Traubel
Nikolaus Muller
Assignee (at issue)
Bayer 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.