US3398546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tail gas separation in plural stages employing liquid natural gas refrigerant
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
2026-11-07 20:38
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/09; C01; C01B; C01B3/00; C01B3/50; C01B3/506; C07C7/005; F; F17; F17C; F17C9/00; F17C9/02; F17C9/04; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0219; F25J3/0228; F25J3/0233; F25J3/0238; F25J3/0242; C01B2203/00; C01B2203/04; C01B2203/0465; C01B2203/047; C01B2203/048; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2221/038; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; 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; F25J2215/04; F25J2215/62; F25J2215/64; F25J2230/00; F25J2230/08; F25J2270/00; F25J2270/90; F25J2270/904; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32; Y02P; Y02P90/00; Y02P90/45
Claims Analysis
Total Claims: 0
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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 |