Granted Patent
Utility
US 5,213,583 · App. 07/796,111
Process for the preparation of improved dyestuff granules from suspension containing a propylene oxide-ethylene oxide copolymer
Inventors:
Vaclav Kaspar, Horst Brandt, Gottfried Popp
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: Nov 21, 1991
Inventors
Vaclav Kaspar
Horst Brandt
Gottfried Popp
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.