Patent US3381922A successfully refreshed from Google Patents.
US3381922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Captive helicopter
Assignee: Individual
•
Filing: 1965-10-23
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Granted: 1968-05-07
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Laing Nikolaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:40
CPC Classifications
B; B05; B05B; B05B3/00; B05B3/18; B64; B64D; B64D1/00; B64D1/16; B64U; B64U10/00; B64U10/10; B64U10/17; B64U10/60; B64U30/00; B64U30/20; B64U50/00; B64U50/10; B64U50/12; B64U80/00; B64U80/80; B64U80/86; B64U2201/00; B64U2201/20; B64U2201/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1523926A
Cited
US1606208A
Cited
GB616997A
Cited
US2634165A
Cited
US2948489A
Cited
US2954932A
Cited
US3117749A
Cited
US2995864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |