Granted Patent
Utility
US 4,598,529 · App. 06/692,539
Method and apparatus for forming, filling and sealing flexible plastic bags
Inventors:
Robert G. Pongrass, Christopher C. Rutter
Patented Case
View Patent ↗
Granted: Jul 8, 1986
Filed: Jan 18, 1985
Inventors
Robert G. Pongrass
Christopher C. Rutter
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.