Granted Patent
Utility
US 4,225,373 · App. 05/753,038
Sealing cross-linked thermoplastic materials
Inventors:
Anne C. Bieler, Milton A. Howe, Jr.
Patented Case
View Patent ↗
Granted: Sep 30, 1980
Filed: Dec 22, 1976
Inventors
Anne C. Bieler
Milton A. Howe, Jr.
Assignee (at issue)
W. R. Grace & Co.
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.