US2745250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse vortex combustion chamber
Assignee: General Electric Co
•
Filing: 1952-09-26
•
Granted: 1956-05-15
•
Expires: 1972-09-26
Abstract
No abstract record available.
Inventors
- 👤 Robert H Johnson
- 👤 Raymond H Shackelford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:35
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/42; F23R3/54; F23R3/02; F23R3/04; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1580656A
Cited
US1852968A
Cited
US2618928A
Cited
US2458992A
Cited
US2625791A
Cited
US2603064A
Cited
US2659201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |