Patent US3457876A successfully refreshed from Google Patents.
US3457876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspended railway system
Assignee: Individual
•
Filing: 1966-07-20
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Granted: 1969-07-29
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Expires: 1986-07-20
Abstract
No abstract record available.
Inventors
- 👤 William Darwin Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:39
CPC Classifications
E; E01; E01B; E01B25/00; E01B25/22; B; B61; B61B; B61B13/00; B61B13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US868736A
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US875864A
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US904526A
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US1064794A
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US1155760A
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US1636619A
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US1797713A
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US2137743A
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US2639784A
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US3104103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |