Granted Patent
Utility
US 5,534,055 · App. 08/295,342
Process for alpha-phase metal phthalocyanine pigments
Inventors:
Herman Gerson, Abdul Sattar
Patented Case
View Patent ↗
Granted: Jul 9, 1996
Filed: Aug 24, 1994
Inventors
Herman Gerson
Abdul Sattar
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.