US2659381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure amplifying device
Assignee: Standard Oil Development Co
•
Filing: 1951-08-17
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Granted: 1953-11-17
•
Expires: 1971-08-17
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Seljos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:52
CPC Classifications
F; F15; F15B; F15B3/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2304782A
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US2308923A
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US2461026A
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US2436451A
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US2529663A
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US2593906A
Cited
US2584455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |