US2539220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seismographic record correlation system
Assignee: ConocoPhillips Co
•
Filing: 1944-06-22
•
Granted: 1951-01-23
•
Expires: 1964-06-22
Abstract
No abstract record available.
Inventors
- 👤 Lawrence F Athy
- 👤 Harold R Prescott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:52
CPC Classifications
G; G06; G06E; G06E3/00; G06E3/001; G06E3/003; G01; G01V; G01V1/00; G01V1/28; G01V1/36; G01V1/364; G01V1/366
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US946265A
Cited
US2024921A
Cited
US2191121A
Cited
US2156198A
Cited
US2151878A
Cited
US2202885A
Cited
US2192972A
Cited
US2167124A
Cited
US2156624A
Cited
US2184313A
Cited
US2243729A
Cited
US2321450A
Cited
US2427421A
Cited
US2348411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |