Patent US1731007A successfully refreshed from Google Patents.
US2620719A
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US
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Rate-of-pressure change controls for pressure cabins
Assignee: Boeing Co
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Filing: 1938-06-27
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Granted: 1952-12-09
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Expires: 1958-06-27
Abstract
No abstract record available.
Inventors
- 👤 Nathan C Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:24
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22272E
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US1407293A
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US1562663A
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GB149709A
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US1511489A
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FR679386A
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US1972190A
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US2002057A
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US2549690A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |