US2047974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring well depths
Assignee: Individual
•
Filing: 1933-11-01
•
Granted: 1936-07-21
•
Expires: 1953-11-01
Abstract
No abstract record available.
Inventors
- 👤 Paul E Lehr
- 👤 Harold T Wyatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:21
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/02; G01V1/133; G01V1/137
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) | 1939-07-21 | 1940-01-20 | 1940-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-07-21 | 1944-01-20 | 1944-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-07-21 | 1948-01-20 | 1948-07-21 | $7700.00 | Window Closed / Lapsed |