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US2553900A
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US
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Method of tracing the underground flow of water
Assignee: Phillips Petroleum Co
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Filing: 1947-12-29
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Granted: 1951-05-22
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Expires: 1967-12-29
Abstract
No abstract record available.
Inventors
- 👤 Richard L Doan
- 👤 Fast Edwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:59
CPC Classifications
G; G01; G01V; G01V9/00; G01V9/02; Y; Y10; Y10T; Y10T436/00; Y10T436/13
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) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |