Granted Patent
Utility
US 6,705,242 · App. 09/683,495
Method and apparatus for hermetically sealing openings of an explosion containment chamber
Inventor:
John L. Donovan
Patented Case
View Patent ↗
Granted: Mar 16, 2004
Filed: Jan 8, 2002
Inventor
John L. Donovan
Assignee (at issue)
CH2M Hill Constructors, 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.