Patent US2581994A successfully refreshed from Google Patents.
US2581994A
Expired / Lapsed
US
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Cable provided with polarized outlets for seismic prospecting
Assignee: Sunoco Inc
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Filing: 1946-04-25
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Granted: 1952-01-08
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Expires: 1966-04-25
Abstract
No abstract record available.
Inventors
- 👤 Alfred C Winterhalter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:36
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US956186A
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US1028260A
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US2166420A
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US1909205A
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US2124207A
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US2241428A
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US2253830A
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US2299140A
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US2354548A
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US2390187A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |