Patent US894280A successfully refreshed from Google Patents.
US894280A
Expired / Lapsed
US
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Engineer's valve for compressed-air-operated dump-cars.
Assignee: Western Wheeled Scraper Co
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Filing: 1907-10-12
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Granted: 1908-07-28
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Expires: 1927-10-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Mcknight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:43
CPC Classifications
F; F03; F03B; F03B11/00; F03B11/02; F16; F16L; F16L3/00; F16L3/01; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87917
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) | 1911-07-28 | 1912-01-27 | 1912-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-07-28 | 1916-01-27 | 1916-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-07-28 | 1920-01-27 | 1920-07-28 | $7700.00 | Window Closed / Lapsed |