Granted Patent
Utility
US 4,376,756 · App. 06/215,885
Process for blending phosphoric acids of differing impurity content
Inventors:
Harold E. Mills, David L. Murdock, Richard M. Ramer, Francis M. Sale
Patented Case
View Patent ↗
Granted: Mar 15, 1983
Filed: Dec 5, 1980
Inventors
Harold E. Mills
David L. Murdock
Richard M. Ramer
Francis M. Sale
Assignee (at issue)
Occidental Chemical Corporation
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.