Patent US3049321A successfully refreshed from Google Patents.
US3049321A
Expired / Lapsed
US
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Amphibious aircraft
Assignee: HILLER AIRCRAFT CORP
•
Filing: 1959-07-20
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Granted: 1962-08-14
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Expires: 1979-07-20
Abstract
No abstract record available.
Inventors
- 👤 John B Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:10
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C35/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1699991A
Cited
US2448064A
Cited
US2581923A
Cited
US2702171A
Cited
US2711077A
Cited
US2707084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |