Granted Patent
Utility
US 4,559,244 · App. 06/672,864
Composite refractory foams
Inventors:
Martin R. Kasprzyk, Monika O. TenEyck
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: Nov 19, 1984
Inventors
Martin R. Kasprzyk
Monika O. TenEyck
Assignee (at issue)
Kennecott Holdings 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.