US2787759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for logging wells
Assignee: Individual
•
Filing: 1950-08-31
•
Granted: 1957-04-02
•
Expires: 1970-08-31
Abstract
No abstract record available.
Inventors
- 👤 Jan J Arps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:16
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/12; E21B47/14; E21B47/18; E21B47/24; G; G01; G01V; G01V3/00; G01V3/18; G01V3/34; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/9682
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2297399A
Cited
US2435934A
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US2329732A
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US2352833A
Cited
US2380520A
Cited
US2480674A
Cited
US2524031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |