Granted Patent
Utility
US 4,987,249 · App. 07/413,793
2,4-pentanedione-1,5-disulfonic acid and method for preparing the same
Inventor:
Stanley R. Sandler
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Sep 28, 1989
Inventor
Stanley R. Sandler
Assignee (at issue)
Atochem North America, 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.