US2544569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signaling system
Assignee: Stanolind Oil and Gas Co
•
Filing: 1946-12-17
•
Granted: 1951-03-06
•
Expires: 1966-12-17
Abstract
No abstract record available.
Inventors
- 👤 Silverman Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:12
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44; E; E21; E21B; E21B47/00; E21B47/12; E21B47/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2401371A
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US2397255A
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US2153802A
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US2216452A
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US2364957A
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US2215297A
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US2376730A
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US2354887A
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US2428155A
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US2431600A
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US2438217A
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US2454911A
Cited
US2456401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |