US2531810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air inlet arrangement for combustion chamber flame tubes
Assignee: MW Kellogg Co
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Filing: 1946-06-05
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Granted: 1950-11-28
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Expires: 1966-06-05
Abstract
No abstract record available.
Inventors
- 👤 Robert J Fyffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:56
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/04; F23R3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |