Granted Patent
Utility
US 6,132,876 · App. 09/212,272
Carbon black pellets and a process for the production thereof
Inventors:
Conny Vogler, Karl Vogel, Udo Wieschnowsky, Jan Kopietz
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Dec 16, 1998
Inventors
Conny Vogler
Karl Vogel
Udo Wieschnowsky
Jan Kopietz
Assignee (at issue)
Degussa 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.