US3801708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen manufacture using centrifugal compressors
Assignee: Chevron USA Inc
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Filing: 1970-06-26
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Granted: 1974-04-02
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Expires: 1990-06-26
Abstract
Abstract A PROCESS FOR MANUFACTURING HIGH PRESSURE, HIGH PURITY HYDROGEN WHICH COMPRISES: (A) GENERATING BY STEAM REFORMING OR PARTIAL OXIDATION OF HYDROCARBONS AT A PRESSURE BELOW ABOUT 450 P.S.I.G. A HYDROGEN-RICH GAS CONTAINING SUFFICIENT CO2 SO THAT THE MOLECULAR WEIGHT OF THE HYDROGEN-RICH GAS IS AT LEAST FOUR; (B) CENTRIFUGALLY COMPRESSING THE HYDROGEN-RICH GAS FROM THE PRESSURE BELOW ABOUT 450 P.S.I.G. TO A SUBSTANTIALLY HIGHER PRESSURE ABOVE 450 P.S.I.G. TO OBTAIN HIGH PRESSURE HYDROGEN-RICH GAS; (C) REMOVING CO2 FROM THE HIGH PRESSURE HYDROGEN-RICH GAS TO OBTAIN HIGH PURITY HYDROGEN, AT LEAST PART OF THE CO2 BEING REMOVED BY ABSORBING CO2 IN A PHYSICAL ABSORBENT.
Inventors
- 👤 C Smith
- 👤 Leod W Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:54
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/36; C10; C10G; C10G49/00; C10G49/007; C10K; C10K1/00; C10K1/08; C10K1/16; C10K1/165; C01B2203/00; C01B2203/02; C01B2203/0205; C01B2203/0227; C01B2203/0233; C01B2203/0283; C01B2203/0288; C01B2203/04; C01B2203/0415; C01B2203/0435; C01B2203/0445; C01B2203/0465; C01B2203/0475; C01B2203/0495; C01B2203/08; C01B2203/0805; C01B2203/0811; C01B2203/0816; C01B2203/0822; C01B2203/0827; C01B2203/0866; C01B2203/0872; C01B2203/0877; C01B2203/0883; C01B2203/0888; C01B2203/0894; C01B2203/10; C01B2203/1041; C01B2203/1047; C01B2203/1052; C01B2203/1076; C01B2203/12; C01B2203/1205; C01B2203/1211; C01B2203/1235; C01B2203/1241; C01B2203/14; C01B2203/146; C01B2203/147; Y; Y02; Y02P; Y02P20/00; Y02P20/10
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |