Patent US757901A successfully refreshed from Google Patents.
US757901A
Expired / Lapsed
US
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Unloading device for air-compressors.
Assignee: JOHN J RILEY
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Filing: 1902-04-29
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Granted: 1904-04-19
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Expires: 1922-04-29
Abstract
No abstract record available.
Inventors
- 👤 William S Fairhurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:12
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/24; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2622
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1907-04-19 | 1907-10-19 | 1908-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-04-19 | 1911-10-19 | 1912-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-04-19 | 1915-10-19 | 1916-04-19 | $7700.00 | Window Closed / Lapsed |