US3018839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic wave well logging system
Assignee: Dresser Industries Inc
•
Filing: 1956-09-06
•
Granted: 1962-01-30
•
Expires: 1976-09-06
Abstract
No abstract record available.
Inventors
- 👤 Walter P Isaacson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:25
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44; G01V1/48; G01V1/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2238991A
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US2301195A
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US2566078A
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US2651027A
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US2704364A
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US2665411A
Cited
US2708485A
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US2905258A
Cited
US2768701A
Cited
US2780795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |