Granted Patent
Utility
US 5,899,435 · App. 08/710,209
Molded rubber valve seal for use in predetermined type valves, such as, a check valve in a regenerative desiccant air dryer
Inventors:
Matthew D. Mitsch, Lawrence R. Streitman
Patented Case
View Patent ↗
Granted: May 4, 1999
Filed: Sep 13, 1996
Inventors
Matthew D. Mitsch
Lawrence R. Streitman
Assignee (at issue)
Westinghouse Air Brake 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.