US2993553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well logging system
Assignee: United Geophysical Corp
•
Filing: 1955-05-09
•
Granted: 1961-07-25
•
Expires: 1975-05-09
Abstract
No abstract record available.
Inventors
- 👤 Edgar T Howes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:29
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2265768A
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US2694461A
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US2708485A
Cited
US2788510A
Cited
US2794512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |