US2959020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the liquefaction and reliquefaction of natural gas
Assignee: CONCH INTERNAT MCTHANE Ltd
•
Filing: 1958-01-29
•
Granted: 1960-11-08
•
Expires: 1978-01-29
Abstract
No abstract record available.
Inventors
- 👤 Knapp Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:00
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/003; F25J1/0032; F25J1/004; F25J1/0002; F25J1/0005; F25J1/0007; F25J1/001; F25J1/0012; F25J1/0015; F25J1/0017; F25J1/0022; F25J1/0025; F25J1/0035; F25J1/0037; F25J1/02; F25J1/0201; F25J1/0202; F25J1/0228; F25J1/0229; F25J1/023; F25J1/0243; F25J1/0257; F25J1/0275; F25J1/0277; F25J1/0279; F25J1/0292; F25J2210/00; F25J2210/90; F25J2220/00; F25J2220/60; F25J2220/62; F25J2230/00; F25J2230/08; F25J2245/00; F25J2245/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2550886A
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US2522787A
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US2509034A
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US2696088A
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US2764877A
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US2783624A
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US2896414A
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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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |