US794257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-stroke pump.
Assignee: Robert W Blackwell & Co Ltd
•
Filing: 1904-09-06
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Granted: 1905-07-11
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Expires: 1924-09-06
Abstract
No abstract record available.
Inventors
- 👤 George William Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:24
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/32; F16F15/36; F16F15/363; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/211; Y10T74/2111
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) | 1908-07-10 | 1909-01-09 | 1909-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-07-10 | 1913-01-09 | 1913-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-07-10 | 1917-01-09 | 1917-07-11 | $7700.00 | Window Closed / Lapsed |