Granted Patent
Utility
US 5,484,481 · App. 08/323,739
Process for the colouration of building materials
Inventors:
Gunter Linde, Manfred Eitel
Patented Case
View Patent ↗
Granted: Jan 16, 1996
Filed: Oct 17, 1994
Inventors
Gunter Linde
Manfred Eitel
Assignee (at issue)
Bayer 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.