Patent US2434752A successfully refreshed from Google Patents.
US2434752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air duct system for aircraft
Assignee: Consolidated Vultee Aircraft Corp
•
Filing: 1945-03-10
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Granted: 1948-01-20
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Expires: 1965-03-10
Abstract
No abstract record available.
Inventors
- 👤 Donald D Waller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:32
CPC Classifications
F; F41; F41H; F41H7/00; F41H7/02; F41H7/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US245689A
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US381008A
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US1263912A
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US1358314A
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US1940244A
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US2099377A
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US2162019A
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US2330322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-19 | 1951-07-21 | 1952-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-19 | 1955-07-21 | 1956-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-19 | 1959-07-21 | 1960-01-20 | $7700.00 | Window Closed / Lapsed |