Patent US2787889A successfully refreshed from Google Patents.
US2787889A
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US
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Aircraft compartment cooling mechanism
Assignee: Boeing Co
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Filing: 1955-08-15
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Granted: 1957-04-09
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Expires: 1975-08-15
Abstract
No abstract record available.
Inventors
- 👤 Douglas H Swank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:04
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D13/08; Y; Y10; Y10S; Y10S62/00; Y10S62/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US942499A
Cited
US2083611A
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US2344215A
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US2440930A
Cited
US2643282A
Cited
US2561876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |