IP Library Granted Patent US 4,026,685
Granted Patent Utility
US 4,026,685 · App. 05/641,248

Flow reversing regenerative air dryer

Inventor: Arthur R. Grix
Patented Case View Patent ↗
Granted: May 31, 1977 Filed: Dec 16, 1975
Inventor
Arthur R. Grix
Assignee (at issue)
Wagner Electric 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.

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Quick Facts
Patent No.
US 4,026,685
App. No.
05/641,248
Filed
1975-12-16
Granted
1977-05-31
Kind
A