Granted Patent
Utility
US 5,958,992 · App. 09/198,872
Blowing agent blends
Inventors:
Jinhuang Wu, Douglas R. Dillon, Richard M. Crooker
Patented Case
View Patent ↗
Granted: Sep 28, 1999
Filed: Nov 24, 1998
Inventors
Jinhuang Wu
Douglas R. Dillon
Richard M. Crooker
Assignee (at issue)
Elf Atochem North America, 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.