US2645409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air induction system heating in supercharged engine
Assignee: Boeing Co
•
Filing: 1948-05-17
•
Granted: 1953-07-14
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Expires: 1968-05-17
Abstract
No abstract record available.
Inventors
- 👤 Lawler John Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:33
CPC Classifications
F; F02; F02B; F02B33/00; F02B33/44; F02B33/446; F02B29/00; F02B37/00; F02B37/12; F02B37/16; F02B37/18; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1222352A
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US1984013A
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US2317723A
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US2356879A
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US2342219A
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US2356370A
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US2368642A
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US2409533A
Cited
US2462097A
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US2464047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |