US2475911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion apparatus
Assignee: Power Jets Research and Development Ltd
•
Filing: 1945-10-09
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Granted: 1949-07-12
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Expires: 1965-10-09
Abstract
No abstract record available.
Inventors
- 👤 Nathan Matthew Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:28
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/42; F23R3/44; F23R3/02; F23R3/04; F23R3/10; F23R3/12; F23R3/46; F23R3/48; Y; Y02; Y02T; Y02T50/00; Y02T50/60
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) | 1952-07-11 | 1953-01-10 | 1953-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-11 | 1957-01-10 | 1957-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-11 | 1961-01-10 | 1961-07-12 | $7700.00 | Window Closed / Lapsed |