US2283429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for determining the location of water strata in wells
Assignee: ROBERT V FUNK
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Filing: 1934-12-17
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Granted: 1942-05-19
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Expires: 1954-12-17
Abstract
No abstract record available.
Inventors
- 👤 George H Ennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:49
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; E21B47/113; E21B47/114; E21B47/11
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) | 1945-05-18 | 1945-11-17 | 1946-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-05-18 | 1949-11-17 | 1950-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-05-18 | 1953-11-17 | 1954-05-19 | $7700.00 | Window Closed / Lapsed |