Granted Patent
Utility
US 4,953,743 · App. 07/367,602
Splash proof raised vent lid
Inventors:
Robert C. Dart, John R. Darras
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Jun 19, 1989
Inventors
Robert C. Dart
John R. Darras
Assignee (at issue)
Dart Container Corporation
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.