Granted Patent
Utility
US 4,576,813 · App. 06/510,527
Heat recovery from concentrated sulfuric acid
Inventors:
Donald R. McAlister, Steven A. Ziebold
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Jul 5, 1983
Inventors
Donald R. McAlister
Steven A. Ziebold
Assignee (at issue)
Monsanto Company
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.