US2925258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunnel boring machine having torsion counteracting means
Assignee: Goodman Manufacturing Co LP
•
Filing: 1957-07-12
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Granted: 1960-02-16
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Expires: 1977-07-12
Abstract
No abstract record available.
Inventors
- 👤 James S Robbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:03
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/11; E21D9/112; E21D9/1093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1353908A
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US1645007A
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US2384397A
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US2756036A
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US2765154A
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US2756037A
Cited
US2760766A
Cited
US2837325A
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US2846600A
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US2816747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |