Granted Patent
Utility
US 5,698,622 · App. 08/811,496
Stabilisation of ABS graft polymers using dithiodipropionic acid
Inventors:
Burkhard Kohler, Werner Tischer
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: Mar 5, 1997
Inventors
Burkhard Kohler
Werner Tischer
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.