US2500129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquefaction system
Assignee: CLARK BROS Co Inc
•
Filing: 1944-08-29
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Granted: 1950-03-07
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Expires: 1964-08-29
Abstract
No abstract record available.
Inventors
- 👤 Francis W Laverty
- 👤 Allan B Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:32
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/003; F25J1/0032; F25J1/0045; F25J1/0002; F25J1/0022; F25J1/004; F25J1/006; F25J1/008; F25J1/0085; F25J1/02; F25J1/0203; F25J1/0208; F25J2220/00; F25J2220/60; F25J2220/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2122238A
Cited
US2142446A
Cited
US2214790A
Cited
US2175590A
Cited
US2280383A
Cited
US2315424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |