Patent US2592049A successfully refreshed from Google Patents.
US2592049A
Expired / Lapsed
US
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Aircraft heating system
Assignee: Boeing Co
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Filing: 1946-12-10
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Granted: 1952-04-08
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Expires: 1966-12-10
Abstract
No abstract record available.
Inventors
- 👤 Robert L Linforth
- 👤 Hage Sigurd Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:03
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D15/00; B64D15/02; B64D15/04; B64D2013/0603; B64D2013/0607; Y; Y02; Y02T; Y02T50/00; Y02T50/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2391838A
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GB376275A
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US2063477A
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US2119402A
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US2341664A
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US2364458A
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US2370035A
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US2412110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |