Granted Patent
Utility
US 5,189,073 · App. 07/855,357
Process for the production of expanded materials based on polyurea elastomers
Inventors:
Heiko Humbert, Werner Klockemann, Dudley J. Primeaux, II
Patented Case
View Patent ↗
Granted: Feb 23, 1993
Filed: Mar 19, 1992
Inventors
Heiko Humbert
Werner Klockemann
Dudley J. Primeaux, II
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.