Patent US3301709A successfully refreshed from Google Patents.
US3301709A
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Method and means for manufacturing liquid oxygen for fuel cells
Assignee: ABB Norden Holding AB
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Filing: 1964-06-12
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Granted: 1967-01-31
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Expires: 1984-06-12
Abstract
No abstract record available.
Inventors
- 👤 Lindstrom Olle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:29
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/06; H01M8/0606; F; F25; F25J; F25J1/00; F25J1/0002; F25J1/0012; F25J1/0015; F25J1/0017; F25J1/02; F25J1/0221; F25J1/0223; F25J1/0243; F25J1/0257; F25J1/0275; F25J1/0277; F25J3/00; F25J3/02; F25J3/04; F25J3/04248; F25J3/04254; F25J3/04278; F25J3/044; F25J3/04521; F25J3/04527; F25J2200/00; F25J2200/72; F25J2210/00; F25J2210/42; F25J2210/50; F25J2250/00; F25J2250/02; F25J2270/00; F25J2270/90; F25J2290/00; F25J2290/62; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN A METHOD OF PRODUCING OXYGEN FOR FUEL CELL SYSTEMS IN SUBMARINES, IN WHICH A FUEL CONTAINING NITROGEN IS COMBUSTED WITH FORMATION OF NITROGEN GAS, WHICH NITROGEN GAS IS AT LEAST PARTLY CONDENSED TO LIQUID STATE IN A CONDENSER, THE STEPS COMPRISING BRINGING THE LIQUID NITROGEN INTO HEAT EXCHANGE RELATION WITH AIR TO CONDENSE AT LEAST SOME OF THE OXYGEN OF THE AIR TO A LIQUID WHILE THE LIQUID NITROGEN IS VAPORIZED, REDUCING THE PRES-
Claim 2
Dependent Claim
75 words
IN A METHOD OF PRODUCING OXYGEN FOR FUEL CELL SYSTEMS IN SUBMARINES, IN WHICH A FUEL CONTAINING NITROGEN IS COMBUSTED WITH FORMATION OF NITROGEN GAS, WHICH NITROGEN GAS IS AT LEAST PARTLY CONDENSED TO LIQUID STATE IN A CONDENSER, THE STEPS COMPRISING BRINGING THE LIQUID NITROGEN INTO HEAT EXCHANGE RELATION WITH AIR TO CONDENSE AT LEAST SOME OF THE OXYGEN OF THE AIR TO A LIQUID WHILE THE LIQUID NITROGEN IS VAPORIZED, REDUCING THE PRES-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |