Granted Patent
Utility
US 6,132,641 · App. 09/077,484
Composition and support material comprising poly(9,9'-spiro-bisfluorenes)
Inventors:
Ralf-Roman Rietz, Wolfgang Wernet
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: May 29, 1998
Inventors
Ralf-Roman Rietz
Wolfgang Wernet
Assignee (at issue)
Vantico Inc.
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.