US2433238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Landing device for aircraft
Assignee: Individual
•
Filing: 1944-10-13
•
Granted: 1947-12-23
•
Expires: 1964-10-13
Abstract
No abstract record available.
Inventors
- 👤 Ramirez Humberto Villarreal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:01
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE57022C
Cited
FR396560A
Cited
GB117119A
Cited
DE388460C
Cited
US1441126A
Cited
US1648196A
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US1811152A
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US1776768A
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US2066776A
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US2391326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-22 | 1951-06-23 | 1951-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-22 | 1955-06-23 | 1955-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-22 | 1959-06-23 | 1959-12-23 | $7700.00 | Window Closed / Lapsed |