Patent US4426094A successfully refreshed from Google Patents.
US2983585A
Expired / Lapsed
US
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Preparation of liquid hydrogen
Assignee: BOC Group Ltd
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Filing: 1958-12-04
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Granted: 1961-05-09
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Expires: 1978-12-04
Abstract
No abstract record available.
Inventors
- 👤 Smith Kenneth Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:21
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/50; C01B3/506; F; F17; F17C; F17C9/00; F17C9/02; F17C9/04; F25; F25J; F25J1/00; F25J1/0002; F25J1/0005; F25J1/001; F25J1/003; F25J1/0032; F25J1/004; F25J1/0045; F25J1/006; F25J1/007; F25J1/0072; F25J1/02; F25J1/0203; F25J1/0208; F25J1/0221; F25J1/0224; F25J1/0228; F25J3/00; F25J3/02; F25J3/04; F25J3/04248; F25J3/04254; F25J3/0426; F25J3/04266; F25J3/04521; F25J3/04527; F25J3/04539; C01B2203/00; C01B2203/04; C01B2203/0465; C01B2203/047; C01B2203/0475; C01B2203/048; F25J2205/00; F25J2205/02; F25J2205/04; F25J2210/00; F25J2210/42; F25J2210/62; F25J2220/00; F25J2220/02; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32; Y02P; Y02P20/00; Y02P20/151; Y02P30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
THE PROCESS FOR THE PRODUCTION OF LIQUID HYDROGEN WHICH COMPRISES THE STEPS OF SUBJECTING GASEOUS METHANE TO PARTIAL COMBUSTION WITH OXYGEN TO PRODUCE A GASEOUS PRODUCT CONSISTING PRINCIPALLY OF CARBON MONOXIDE AND HYDROGEN, REACTING SAID GASEOUS PRODUCT WITH STREAM TO CONVERT THE CARBON MONOXIDE PRESENT THEREIN TO CARBON DIOXIDE AND HYDROGEN, REMOVING CARBON DIOXIDE FROM SAID TREATED PRODUCT, THEREBY LEAVING GASEOUS HYDROGEN CONTAINING MINOR AMOUNTS OF IMPURITIES, COMPRESSING SAID IMPURE GASEOUS HYDROGEN TO A RELATIVELY HIGH PRESSURE, COOLING SAID COMPRESSED IMPURE GASEOUS HYDROGEN BY HEAT EXCHANGE WITH A STREAM OF LIQUID METHANE, WHEREBY SAID LIQUID METHANE IS VAPORISED, USING SAID VAPORISED METHANE TO PROVIDE A PART OF THE GASEOUS METHANE FEED TO SAID PARTIAL COMBUSTION STEP, REMOVING FROM SAID COOLED COMPRESSED IMPURE GASEOUS HYDROGEN IMPURITIES CONDENSED IN SAID COOLING STEP, FURTHER COOLING SAID COMPRESSED IMPURE GASEOUS HYDROGEN BY INDIRECT HEAT EXCHANGE THROUGH THE MEDIUM OF AN INERT HEAT TRANSFER MEDIUM WITH A STORED BODY OF LIQUID METHANE WHEREBY A PORTION OF SAID LIQUID METHANE IS VAPORISED, USING THE VAPORISED METHANE SO PRODUCED TO PROVIDE A FURTHER PART
Claim 2
Dependent Claim
177 words
THE PROCESS FOR THE PRODUCTION OF LIQUID HYDROGEN WHICH COMPRISES THE STEPS OF SUBJECTING GASEOUS METHANE TO PARTIAL COMBUSTION WITH OXYGEN TO PRODUCE A GASEOUS PRODUCT CONSISTING PRINCIPALLY OF CARBON MONOXIDE AND HYDROGEN, REACTING SAID GASEOUS PRODUCT WITH STREAM TO CONVERT THE CARBON MONOXIDE PRESENT THEREIN TO CARBON DIOXIDE AND HYDROGEN, REMOVING CARBON DIOXIDE FROM SAID TREATED PRODUCT, THEREBY LEAVING GASEOUS HYDROGEN CONTAINING MINOR AMOUNTS OF IMPURITIES, COMPRESSING SAID IMPURE GASEOUS HYDROGEN TO A RELATIVELY HIGH PRESSURE, COOLING SAID COMPRESSED IMPURE GASEOUS HYDROGEN BY HEAT EXCHANGE WITH A STREAM OF LIQUID METHANE, WHEREBY SAID LIQUID METHANE IS VAPORISED, USING SAID VAPORISED METHANE TO PROVIDE A PART OF THE GASEOUS METHANE FEED TO SAID PARTIAL COMBUSTION STEP, REMOVING FROM SAID COOLED COMPRESSED IMPURE GASEOUS HYDROGEN IMPURITIES CONDENSED IN SAID COOLING STEP, FURTHER COOLING SAID COMPRESSED IMPURE GASEOUS HYDROGEN BY INDIRECT HEAT EXCHANGE THROUGH THE MEDIUM OF AN INERT HEAT TRANSFER MEDIUM WITH A STORED BODY OF LIQUID METHANE WHEREBY A PORTION OF SAID LIQUID METHANE IS VAPORISED, USING THE VAPORISED METHANE SO PRODUCED TO PROVIDE A FURTHER PART
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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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |