US2836444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural post-attachment mechanism
Assignee: Eastern Rotorcraft Corp
•
Filing: 1954-10-04
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Granted: 1958-05-27
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Expires: 1974-10-04
Abstract
No abstract record available.
Inventors
- 👤 Arnold Garland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:53
CPC Classifications
A; A47; A47B; A47B91/00; A47B91/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190724901A
Cited
US2464543A
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US2427681A
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US2408547A
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US2422693A
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US2448817A
Cited
US2676822A
Cited
US2730687A
Cited
US2739292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |