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US3415574A
Expired / Lapsed
US
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Tunnel driving machine steering system
Assignee: MASCHINENFABRIK HABEGGER AG
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Filing: 1967-03-06
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Granted: 1968-12-10
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Expires: 1987-03-06
Abstract
No abstract record available.
Inventors
- 👤 Lauber Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:48
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/1093; E21D9/11; E21D9/116
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) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |