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US3575719A Expired / Lapsed US ⏱️ 0.0 years remaining

Compact cell construction

Assignee: Allis Chalmers Corp
•
Filing: 1968-10-09
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Granted: 1971-04-20
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Expires: 1988-10-09
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Abstract

Abstract A SEPARABLE SEALING CONSTRUCTION FOR FUEL CELLS AND OTHER ELECTROCHEMICAL AND MEMBRANE PROCESS CELLS WHICH PERMITS THE NONDESTRUCTIVE SEPARATION AND RESTACKING OF THE SEVERAL UNITARY CELLS IN A PLURALITY OF CELLS, OR THE DISASSEMBLY AND REASSEMBLY OF ELEMENTAL MEMBERS COMPRISING A SINGLE CELL. THE SEALING CONSTRUCTION COMPRISES GASKET MEANS LYING IN THE SAME GEOMETRIC PLANE OR PLANES AS THE FLUID DISTRIBUTION MATRIX OR MATRICES OF THE CELL OR CELL ASSEMBLY. A FURTHER FEATURE IS THE PROVISION OF A SYMMETRICAL INLET AND AN OUTLET PORT ARRANGEMENT IN THE CELL FRAME WHICH PERMITS REVERSE EDGE ORIENTATION AND REVERSE SURFACE ORIENTATION OF THE CELL FRAME, WHILE STILL MAINTAINING A PROPER FLUID FLOW RELATION OF THE INLET AND OUTLET CONDUITS TO THE INLET AND OUTLET PORTS.

Inventors

  • 👤 Canden R Nelson
  • 👤 Hilbert P Bruss

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 12:19
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/02; H01M8/0271; H01M8/0273; H01M8/0202; H01M8/0267; H01M8/24; H01M8/241; H01M8/242; H01M8/2465; H01M8/2483; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-04-19 1974-10-19 1975-04-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-04-19 1978-10-19 1979-04-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-04-19 1982-10-19 1983-04-20 $7700.00 Window Closed / Lapsed

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