US2802703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic jar
Assignee: Houston Engineers Inc
•
Filing: 1956-08-02
•
Granted: 1957-08-13
•
Expires: 1976-08-02
Abstract
No abstract record available.
Inventors
- 👤 Harry W Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:13
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/107; E21B31/113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23354E
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US2733045A
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US1637505A
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US1804700A
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US1803732A
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US2205910A
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US2643147A
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US2647778A
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US2645459A
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US2721056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |