US682939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump mechanism for deep wells.
Assignee: Individual
•
Filing: 1900-09-29
•
Granted: 1901-09-17
•
Expires: 1920-09-29
Abstract
No abstract record available.
Inventors
- 👤 Edmund Masters Ivens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:01
CPC Classifications
E; E21; E21B; E21B21/00; Y; Y10; Y10S; Y10S415/00; Y10S415/901
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) | 1904-09-16 | 1905-03-18 | 1905-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-09-16 | 1909-03-18 | 1909-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-09-16 | 1913-03-18 | 1913-09-17 | $7700.00 | Window Closed / Lapsed |