Patent US3109725A successfully refreshed from Google Patents.
US3109725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen liquefaction
Assignee: Bendix Corp
•
Filing: 1961-11-01
•
Granted: 1963-11-05
•
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 05:41
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)
US53682A
Cited
US101682A
Cited
US310025A
Cited
US2297786A
Cited
US2550886A
Cited
US2937506A
Cited
US2932173A
Cited
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 |