Patent US2633713A successfully refreshed from Google Patents.
US2633713A
Expired / Lapsed
US
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Cage for use in excavating trenches
Assignee: TREATY EXCAVATING Corp
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Filing: 1949-06-24
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Granted: 1953-04-07
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Expires: 1969-06-24
Abstract
No abstract record available.
Inventors
- 👤 Gene B Shields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:06
CPC Classifications
E; E03; E03F; E03F3/00; E03F3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE537585C
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GB190304271A
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US840747A
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US1634104A
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US1829162A
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US1768146A
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US1792855A
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US1991919A
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US2188077A
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US2260423A
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US2324465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |