Patent US1759920A successfully refreshed from Google Patents.
Patent US2725820A successfully refreshed from Google Patents.
US2725820A
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Explosive jarring device
Assignee: Mccullough Tool Co
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Filing: 1950-11-08
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Granted: 1955-12-06
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Expires: 1970-11-08
Abstract
No abstract record available.
Inventors
- 👤 Mccullough Otis Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:59
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/107; E21B31/1075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US120186A
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US1077991A
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US1844575A
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US1474548A
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GB220324A
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US2265982A
Cited
US2362829A
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US2414349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |