Granted Patent
Utility
US 6,231,624 · App. 08/866,245
Process for continuous dry granulation of powered carbon black
Inventors:
Conny Vogler, Karl Vogel, Jan Kopietz
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: Jun 5, 1997
Inventors
Conny Vogler
Karl Vogel
Jan Kopietz
Assignee (at issue)
Degussa-Huels AG
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.