Granted Patent
Utility
US 5,643,638 · App. 08/571,476
Plasma CVD method of producing a gradient layer
Inventors:
Jurgen Otto, Johannes Segner, Volker Paquet
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Dec 13, 1995
Inventors
Jurgen Otto
Johannes Segner
Volker Paquet
Assignee (at issue)
Schott Glaswerke
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.