Granted Patent
Utility
US 5,488,123 · App. 08/384,404
Polycondensates containing polysiloxane groups
Inventors:
Fritz Engelhardt, Jurgen Kuhlwein, Wilfried Schuler, Ralf Zerrer, Werner Antwerpen
Patented Case
View Patent ↗
Granted: Jan 30, 1996
Filed: Feb 6, 1995
Inventors
Fritz Engelhardt
Jurgen Kuhlwein
Wilfried Schuler
Ralf Zerrer
Werner Antwerpen
Assignee (at issue)
Cassella 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.