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US2909903A
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Liquefaction of low-boiling gases
Assignee: Arthur D Little Inc
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Filing: 1956-11-07
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Granted: 1959-10-27
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Expires: 1976-11-07
Abstract
No abstract record available.
Inventors
- 👤 Francis J Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:52
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0243; F25J1/0257; F25J1/0275; F25J1/0276; F25J1/0002; F25J1/0005; F25J1/001; F25J1/003; F25J1/0032; F25J1/004; F25J1/0047; F25J1/005; F25J1/006; F25J1/0062; F25J1/0065; F25J1/0221; F25J2210/00; F25J2210/40; F25J2210/42; F25J2270/00; F25J2270/14; F25J2270/16; F25J2290/00; F25J2290/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |