Granted Patent
Utility
US 5,989,475 · App. 09/091,452
Process for the stereolithographic preparation of three-dimensional objects using a radiation-curable liquid formulation which contains fillers
Inventors:
Adrian Schulthess, Bettina Steinmann, Manfred Hofmann
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Jun 18, 1998
Inventors
Adrian Schulthess
Bettina Steinmann
Manfred Hofmann
Assignee (at issue)
Ciba Specialty Chemicals Corporation
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.