US3398545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen recovery from a refinery tail gas employing two stage scrubbing
Assignee: Conch International Methane Ltd
•
Filing: 1966-02-04
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Granted: 1968-08-27
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Expires: 1986-02-04
Abstract
No abstract record available.
Inventors
- 👤 Warren L Nelson
- 👤 Christopher E Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:13
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0203; F25J1/0204; C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; F17; F17C; F17C9/00; F17C9/02; F17C9/04; F25J1/0002; F25J1/0005; F25J1/001; F25J1/003; F25J1/0047; F25J1/0052; F25J1/006; F25J1/007; F25J1/0072; F25J1/0221; F25J1/0228; F25J1/0229; F25J1/0235; F25J1/0236; F25J1/0243; F25J1/0257; F25J1/0262; F25J1/0264; F25J1/0265; F25J1/0268; F25J3/00; F25J3/02; F25J3/0204; F25J3/0209; F25J3/0214; F25J3/0219; F25J3/0228; F25J3/0233; F25J3/0238; F25J3/0242; F25J3/0252; C01B2203/00; C01B2203/04; C01B2203/0405; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2221/00; F17C2221/01; F17C2221/012; F17C2221/014; F17C2221/03; F17C2221/032; F17C2221/033; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2227/00; F17C2227/01; F17C2227/0128; F17C2227/0135; F17C2227/0157; F17C2227/03; F17C2227/0367; F17C2227/0388; F17C2227/0393; F17C2265/00; F17C2265/01; F17C2265/015; F25J2200/00; F25J2200/80; F25J2205/00; F25J2205/02; F25J2205/04; F25J2205/30; F25J2210/00; F25J2210/12; F25J2210/62; F25J2215/00; F25J2215/62; F25J2215/64; F25J2270/00; F25J2270/42; F25J2270/90; F25J2270/904; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32; Y02P; Y02P90/00; Y02P90/45; Y10; Y10S; Y10S62/00; Y10S62/931; Y10S62/932
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2880592A
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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) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |