Granted Patent
Utility
US 4,952,732 · App. 06/621,332
Mannich condensates of a substituted phenol and an alkylamine containing internal alkoxy groups
Inventors:
George P. Speranza, Robert A. Grigsby, Jr., Ernest L. Yeakey
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Jun 15, 1984
Inventors
George P. Speranza
Robert A. Grigsby, Jr.
Ernest L. Yeakey
Assignee (at issue)
Texaco 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.