Granted Patent
Utility
US 4,812,596 · App. 07/032,890
Process for the conversion of t-alkylphenol waste distillation bottoms to para-t-alkylphenol
Inventors:
Altaf Husain, Stanley R. Sandler
Patented Case
View Patent ↗
Granted: Mar 14, 1989
Filed: Mar 31, 1987
Inventors
Altaf Husain
Stanley R. Sandler
Assignee (at issue)
Pennwalt 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.