Patent US2864173A successfully refreshed from Google Patents.
US2864173A
Expired / Lapsed
US
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Electrical well caliper tool
Assignee: Perforating Guns Atlas Corp
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Filing: 1955-03-08
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Granted: 1958-12-16
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Expires: 1975-03-08
Abstract
No abstract record available.
Inventors
- 👤 Jacques H Castel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:54
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1339955A
Cited
GB463361A
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US2102080A
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US2340987A
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US2415636A
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US2419461A
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US2640275A
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US2660800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |