US2414202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supercharger and exhaust valve control means for pressurized cabins
Assignee: Boeing Co
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Filing: 1942-07-04
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Granted: 1947-01-14
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Expires: 1962-07-04
Abstract
No abstract record available.
Inventors
- 👤 Alfred B Jepson
- 👤 James B Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:55
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/02; B64D13/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788; Y10T137/7793; Y10T137/7831
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-01-13 | 1950-07-15 | 1951-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-01-13 | 1954-07-15 | 1955-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-01-13 | 1958-07-15 | 1959-01-14 | $7700.00 | Window Closed / Lapsed |