US2507351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmitting of information in drill holes
Assignee: Well Surveys Inc
•
Filing: 1945-11-23
•
Granted: 1950-05-09
•
Expires: 1965-11-23
Abstract
No abstract record available.
Inventors
- 👤 Serge A Scherbatskoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:46
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/34; E; E21; E21B; E21B47/00; E21B47/12; E21B47/13; G01V5/00; G01V5/04; G01V5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1842968A
Cited
US2283429A
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US2225668A
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US2368532A
Cited
US2285809A
Cited
US2301458A
Cited
US2380520A
Cited
US2416328A
Cited
US2418268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |