Granted Patent
Utility
US 4,880,869 · App. 07/251,376
.beta.-amino-.beta.-propiolactam derivative and moisture curable polyurethane composition thereof
Inventors:
Masaaki Aoki, Mayumi Tani, Masayuki Kamiyama, Kiyotsugu Asai
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Sep 14, 1988
Inventors
Masaaki Aoki
Mayumi Tani
Masayuki Kamiyama
Kiyotsugu Asai
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.