Granted Patent
Utility
US 5,093,382 · App. 07/741,917
Preparation of foams using polyfunctional organic acids
Inventors:
George P. Speranza, Donald H. Champion
Patented Case
View Patent ↗
Granted: Mar 3, 1992
Filed: Aug 8, 1991
Inventors
George P. Speranza
Donald H. Champion
Assignee (at issue)
Texaco Chemical 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.