US2960837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquefying natural gas with low pressure refrigerants
Assignee: Conch International Methane Ltd
•
Filing: 1958-07-16
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Granted: 1960-11-22
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Expires: 1978-07-16
Abstract
No abstract record available.
Inventors
- 👤 Leonard K Swenson
- 👤 Lury James De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:06
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0257; F25J1/00; F25J1/0002; F25J1/0022; F25J1/003; F25J1/0032; F25J1/004; F25J1/0045; F25J1/0047; F25J1/0052; F25J1/006; F25J1/008; F25J1/0085; F25J1/0087; F25J1/02; F25J1/0203; F25J1/0208; F25J1/0209; F25J1/021; F25J1/0243; F25J1/0257; F25J1/0262; F25J1/0264; F25J1/0265; F25J1/0267; F25J3/0204; F25J3/0209; F25J3/0233; F25J2200/00; F25J2200/02; F25J2200/50; F25J2200/74; F25J2215/00; F25J2215/04; F25J2270/00; F25J2270/02; F25J2270/12; F25J2270/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2541569A
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US2556850A
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US2495549A
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US2663169A
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US2696088A
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US2823523A
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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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |