US3095274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen liquefaction and conversion systems
Assignee: Air Products and Chemicals Inc
•
Filing: 1958-07-01
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Granted: 1963-06-25
•
Expires: 1978-07-01
Abstract
No abstract record available.
Inventors
- 👤 Duffer B Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:24
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0221; F25J1/0224; F25J1/0002; F25J1/0005; F25J1/001; F25J1/003; F25J1/0032; F25J1/0035; F25J1/0037; F25J1/004; F25J1/0045; F25J1/0047; F25J1/0052; F25J1/006; F25J1/0062; F25J1/0067; F25J1/0203; F25J1/0208; F25J2210/00; F25J2210/42; Y; Y10; Y10S; Y10S62/00; Y10S62/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
METHOD OF PRODUCING HYDROGEN OF HIGH PARA CONCENTRATION WHICH COMPRISES THE STEPS OF COOLING HYDROGEN TO A LOW TEMPERATURE, PROVIDING A SOURCE OF LIQUEFIED GAS UNDER SUPERATMOSPHERIC PRESSURE, CATALYTICALLY TREATING COOLED HYDROGEN TO ACCELERATE CONVERSION OF ORTHO HYDROGEN TO PARA HYDROEN AND ESTABLISH A HIGH PARA HYDROGEN CONCENTRATION, VAPORIZING LIQUEFIED GAS UNDER SUPERATMOSPHERIC PRESSURE BY HEAT GENERATED FROM THE CONVERSION, AND PROVIDING A PORTION OF THE POWER REQUIRED TO COOL THE HYDROGEN TO THE LOW TEMPERATURE FROM THE EN-
Claim 2
Dependent Claim
79 words
METHOD OF PRODUCING HYDROGEN OF HIGH PARA CONCENTRATION WHICH COMPRISES THE STEPS OF COOLING HYDROGEN TO A LOW TEMPERATURE, PROVIDING A SOURCE OF LIQUEFIED GAS UNDER SUPERATMOSPHERIC PRESSURE, CATALYTICALLY TREATING COOLED HYDROGEN TO ACCELERATE CONVERSION OF ORTHO HYDROGEN TO PARA HYDROEN AND ESTABLISH A HIGH PARA HYDROGEN CONCENTRATION, VAPORIZING LIQUEFIED GAS UNDER SUPERATMOSPHERIC PRESSURE BY HEAT GENERATED FROM THE CONVERSION, AND PROVIDING A PORTION OF THE POWER REQUIRED TO COOL THE HYDROGEN TO THE LOW TEMPERATURE FROM THE EN-
References Cited (Backward Citations)
US1574119A
Cited
US2937076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |