Granted Patent
Utility
US 5,137,930 · App. 07/823,100
Dispersant for carbon black-filled foam
Inventor:
Thomas G. Soukup
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Jan 21, 1992
Inventor
Thomas G. Soukup
Assignees (at issue)
Celotex Corporation
Apache Building Products Company
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.