Patent US2703008A successfully refreshed from Google Patents.
US2703008A
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Weight on bit indicating and drilling control signaling apparatus
Assignee: Standard Oil Development Co
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Filing: 1951-08-17
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Granted: 1955-03-01
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Expires: 1971-08-17
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Seljos
- 👤 Algernon S Badger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:02
CPC Classifications
E; E21; E21B; E21B44/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-28 | 1958-08-30 | 1959-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-28 | 1962-08-30 | 1963-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-28 | 1966-08-30 | 1967-03-01 | $7700.00 | Window Closed / Lapsed |