US2476309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for subaqueous geologic prospecting
Assignee: Individual
•
Filing: 1944-05-25
•
Granted: 1949-07-19
•
Expires: 1964-05-25
Abstract
No abstract record available.
Inventors
- 👤 Walter B Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:18
CPC Classifications
E; E21; E21B; E21B25/00; E21B25/18; E21B17/00; E21B17/01; E21B17/012; E21B19/00; E21B19/08; E21B19/09; E21B7/00; E21B7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US496729A
Cited
GB160865A
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US1517556A
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US2033035A
Cited
US2244830A
Cited
US2187871A
Cited
US2171672A
Cited
US2248051A
Cited
US2239531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |