US2786987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock-in geophone for boreholes
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1954-08-03
•
Granted: 1957-03-26
•
Expires: 1974-08-03
Abstract
No abstract record available.
Inventors
- 👤 Richard N Jolly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:55
CPC Classifications
G; G01; G01V; G01V11/00; G01V11/002; G01V11/005; Y; Y10; Y10S; Y10S181/00; Y10S181/40; Y10S181/401; Y10S367/00; Y10S367/911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR804111A
Cited
US2396935A
Cited
US2428168A
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US2646680A
Cited
US2650067A
Cited
US2669688A
Cited
US2681442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |