US2583920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal fired combustion chamber with regenerator tubes on either side within the turbine exhaust duct
Assignee: Bituminous Coal Research Inc
•
Filing: 1947-05-08
•
Granted: 1952-01-29
•
Expires: 1967-05-08
Abstract
No abstract record available.
Inventors
- 👤 John I Yellott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:18
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2154481A
Cited
GB433631A
Cited
GB478688A
Cited
GB484289A
Cited
GB539069A
Cited
GB541845A
Cited
US2268464A
Cited
US2398654A
Cited
US2458066A
Cited
US2476031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |