Patent US2937076A successfully refreshed from Google Patents.
US2937076A
Expired / Lapsed
US
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Process for the production of para liquid hydrogen
Assignee: Beechcraft Corp
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Filing: 1957-12-13
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Granted: 1960-05-17
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Expires: 1977-12-13
Abstract
No abstract record available.
Inventors
- 👤 Charles R Class
- 👤 Raymond P Spero
- 👤 Glen E Mcintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:29
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0221; F25J1/0224; C; C01; C01B; C01B3/00; C01B3/0089; F25J1/0002; F25J1/0005; F25J1/001; F25J1/003; F25J1/0032; F25J1/0035; F25J1/0037; F25J1/004; F25J1/0045; F25J2205/00; F25J2205/82; F25J2210/00; F25J2210/06; F25J2210/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD FOR PRODUCING THE PARA FORM OF LIQUID HYDROGEN COMPRISING PASSING HYDROGEN GAS UNDER PRESSURE TO A FIRST HEAT EXCHANGE ZONE TO EFFECT A COOLING THEREOF, PASSING THE COOLED GAS TO A SECOND REFRIGERATED HEAT EXCHANGE ZONE TO FURTHER COOL THE GAS, SAID SECOND HEAT EXCHANGE ZONE HAVING A PARA MAGNETIC OXIDE CATALYST PRESENT THEREIN TO CONVERT A PART OF SAID HYDROGEN GAS PASSED THEREIN TO THE PARA FORM, PASSING SAID PARTIALLY CONVERTED GAS THROUGH A PLURALITY OF HEAT EXCHANGE ZONES TO EFFECT STEPWISE COOLING OF SAID PARTIALLY CONVERTED GAS, DIVIDING THE INCOMING GAS DURING THE STEPWISE COOLING, PASSING ONE PART TO AN EXPANSION ZONE, PASSING THE EXPANDED PART BACK THROUGH AT LEAST SOME OF THE HEAT EXCHANGE ZONES TO PROVIDE REFRIGERATION TO COOL
Claim 2
Independent Claim
125 words
THE METHOD FOR PRODUCING THE PARA FORM OF LIQUID HYDROGEN COMPRISING PASSING HYDROGEN GAS UNDER PRESSURE TO A FIRST HEAT EXCHANGE ZONE TO EFFECT A COOLING THEREOF, PASSING THE COOLED GAS TO A SECOND REFRIGERATED HEAT EXCHANGE ZONE TO FURTHER COOL THE GAS, SAID SECOND HEAT EXCHANGE ZONE HAVING A PARA MAGNETIC OXIDE CATALYST PRESENT THEREIN TO CONVERT A PART OF SAID HYDROGEN GAS PASSED THEREIN TO THE PARA FORM, PASSING SAID PARTIALLY CONVERTED GAS THROUGH A PLURALITY OF HEAT EXCHANGE ZONES TO EFFECT STEPWISE COOLING OF SAID PARTIALLY CONVERTED GAS, DIVIDING THE INCOMING GAS DURING THE STEPWISE COOLING, PASSING ONE PART TO AN EXPANSION ZONE, PASSING THE EXPANDED PART BACK THROUGH AT LEAST SOME OF THE HEAT EXCHANGE ZONES TO PROVIDE REFRIGERATION TO COOL
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |