Patent US762808A successfully refreshed from Google Patents.
US762808A
Expired / Lapsed
US
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Apparatus for maintaining a continuous flow of sand-carrying oil from wells.
Assignee: Individual
•
Filing: 1903-03-02
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Granted: 1904-06-14
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Expires: 1923-03-02
Abstract
No abstract record available.
Inventors
- 👤 William T Cushing
- 👤 Horace G Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:31
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/04; F04D9/06; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17931; Y10T279/17941; Y10T279/17948
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) | 1907-06-14 | 1907-12-14 | 1908-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-06-14 | 1911-12-14 | 1912-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-06-14 | 1915-12-14 | 1916-06-14 | $7700.00 | Window Closed / Lapsed |