US2869830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for heating fluid
Assignee: Power Jets Research and Development Ltd
•
Filing: 1953-01-22
•
Granted: 1959-01-20
•
Expires: 1973-01-22
Abstract
No abstract record available.
Inventors
- 👤 Cox Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:55
CPC Classifications
F; F02; F02C; F02C1/00; F02C1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2268270A
Cited
US2282923A
Cited
US2345950A
Cited
US2404938A
Cited
US2471123A
Cited
US2632297A
Cited
US2655364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |