US2689456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open cycle gas turbine and cleaning means therefor
Assignee: Bituminous Coal Research Inc
•
Filing: 1951-06-22
•
Granted: 1954-09-21
•
Expires: 1971-06-22
Abstract
No abstract record available.
Inventors
- 👤 Roy B White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:33
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/002
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US72348A
Cited
US777251A
Cited
US1101545A
Cited
US1088761A
Cited
US1218620A
Cited
US1824893A
Cited
US1950796A
Cited
US2103453A
Cited
US2030830A
Cited
US2216698A
Cited
US2533866A
Cited
US2625791A
Cited
US2437013A
Cited
US2601390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |