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Patent US2930439A successfully refreshed from Google Patents.
US2930439A
Expired / Lapsed
US
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Buoyant traction vehicle
Assignee: ALIG TERRA MARINA EQUIPMENT LT
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Filing: 1956-06-01
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Granted: 1960-03-29
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Expires: 1976-06-01
Abstract
No abstract record available.
Inventors
- 👤 Alig Georges
- 👤 Roman J Filipkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:09
CPC Classifications
B; B60; B60F; B60F3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1393779A
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US1090132A
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US1202472A
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US1294791A
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US1416329A
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US1602630A
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GB423542A
Cited
US2107384A
Cited
US2503111A
Cited
DE812676C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |