Patent US2623916A successfully refreshed from Google Patents.
US2623916A
Expired / Lapsed
US
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Electrical measuring system
Assignee: Schlumberger Well Surveying Corp
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Filing: 1948-06-24
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Granted: 1952-12-30
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Expires: 1968-06-24
Abstract
No abstract record available.
Inventors
- 👤 Wilbur C Welz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/14; G01; G01R; G01R1/00; G01R1/30
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) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |