US3109725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen liquefaction
Assignee: Bendix Corp
•
Filing: 1961-11-01
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Granted: 1963-11-05
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Expires: 1981-11-01
Abstract
No abstract record available.
Inventors
- 👤 Thomas M Flynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:31
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0221; F25J1/0224; F25J1/0002; F25J1/0005; F25J1/001; F25J1/003; F25J1/0032; F25J1/004; F25J2205/00; F25J2205/90; F25J2210/00; F25J2210/04; F25J2210/42; F25J2245/00; F25J2245/02; F25J2245/42; F25J2290/00; F25J2290/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
THE IMPROVEMENT IN CONDUCTING THE JOULE-THOMSON HYDROGEN LIQUEFACTION PROCESS WITH PRECOOLING OF THE HYDROGEN GAS BY A BOILING LIQUID NITROGEN COOLANT WHICH COMPRISES LOWERING THE BOILING POINT OF THE LIQUID NITROGEN BY MECHANICALLY MIXING A GAS FROM THE GROUP CONSISTING OF HYDROGEN AND HELIUM GAS WITH THE BOILING NITROGEN COOLANT.
Claim 2
Dependent Claim
50 words
THE IMPROVEMENT IN CONDUCTING THE JOULE-THOMSON HYDROGEN LIQUEFACTION PROCESS WITH PRECOOLING OF THE HYDROGEN GAS BY A BOILING LIQUID NITROGEN COOLANT WHICH COMPRISES LOWERING THE BOILING POINT OF THE LIQUID NITROGEN BY MECHANICALLY MIXING A GAS FROM THE GROUP CONSISTING OF HYDROGEN AND HELIUM GAS WITH THE BOILING NITROGEN COOLANT.
References Cited (Backward Citations)
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US2297786A
Cited
US2550886A
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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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |