US2776114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable hydraulically operated digger
Assignee: Individual
•
Filing: 1953-06-23
•
Granted: 1957-01-01
•
Expires: 1973-06-23
Abstract
No abstract record available.
Inventors
- 👤 Howard D Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:12
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US515731A
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US1304523A
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US1317875A
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US2094588A
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US2137900A
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US2319512A
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US2594098A
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US2562276A
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US2490471A
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US2622847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |