Granted Patent
Utility
US 6,180,694 · App. 08/359,710
Process for warp-free pigmenting of polyolefins
Inventors:
Philippe Bugnon, Fritz Herren
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Dec 20, 1994
Inventors
Philippe Bugnon
Fritz Herren
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.