Patent US2492459A successfully refreshed from Google Patents.
US2492459A
Expired / Lapsed
US
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Blasting cap circuit tester
Assignee: Phillips Petroleum Co
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Filing: 1944-11-03
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Granted: 1949-12-27
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Expires: 1964-11-03
Abstract
No abstract record available.
Inventors
- 👤 John E Bondurant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:42
CPC Classifications
F; F42; F42C; F42C21/00; F42B; F42B3/00; F42B3/10; F42B3/195; F42D; F42D1/00; F42D1/04; F42D1/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1301434A
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US1593024A
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US1925694A
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US2179901A
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US2163475A
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US2098212A
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US2290307A
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US2255946A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |