Patent US661574A successfully refreshed from Google Patents.
US661574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick-releasing valve for air-brakes.
Assignee: Individual
•
Filing: 1900-08-07
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Granted: 1900-11-13
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Expires: 1920-08-07
Abstract
No abstract record available.
Inventors
- 👤 Perry Hughes Corbett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:07
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0416; F15B13/0417; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2557; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/8593; Y10T137/87169
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) | 1903-11-13 | 1904-05-14 | 1904-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-11-13 | 1908-05-14 | 1908-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-11-13 | 1912-05-14 | 1912-11-13 | $7700.00 | Window Closed / Lapsed |