Granted Patent
Utility
US 4,939,019 · App. 07/436,834
Compositions and process for producing foam plastics
Inventors:
Ching-Chi Kuo, Mark K. Robertson, Kyu-Wang Lee
Patented Case
View Patent ↗
Granted: Jul 3, 1990
Filed: Nov 15, 1989
Inventors
Ching-Chi Kuo
Mark K. Robertson
Kyu-Wang Lee
Assignee (at issue)
Hexcel 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.