Patent US2640674A successfully refreshed from Google Patents.
US2640674A
Expired / Lapsed
US
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Mine stemple comprising two telescoping sections
Assignee: Individual
•
Filing: 1950-12-13
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Granted: 1953-06-02
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Expires: 1970-12-13
Abstract
No abstract record available.
Inventors
- 👤 Gerlach Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:47
CPC Classifications
E; E21; E21D; E21D15/00; E21D15/58; E21D15/581; E21D15/5817
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |