Granted Patent
Utility
US 4,619,848 · App. 06/598,145
Compositions and methods for sealing containers
Inventors:
John Knight, Geoffrey R. Thwaites
Patented Case
View Patent ↗
Granted: Oct 28, 1986
Filed: Apr 9, 1984
Inventors
John Knight
Geoffrey R. Thwaites
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.