Granted Patent
Utility
US 4,752,397 · App. 06/880,297
Process for removing heavy metal ions from solutions using adsorbents containing activated hydrotalcite
Inventor:
Ajay Sood
Patented Case
View Patent ↗
Granted: Jun 21, 1988
Filed: Jun 30, 1986
Inventor
Ajay Sood
Assignee (at issue)
Aluminum Company of America
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.