Granted Patent
Utility
US 4,844,880 · App. 06/813,795
Process for the manufacture of sodium metabisulfite
Inventors:
Samuel L. Bean, Mark D. Dulik, Robert Wilson
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Dec 27, 1985
Inventors
Samuel L. Bean
Mark D. Dulik
Robert Wilson
Assignee (at issue)
HMC Patents Holding Co., Inc.
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.