US3101595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed water heaters
Assignee: English Electric Co Ltd
•
Filing: 1961-02-27
•
Granted: 1963-08-27
•
Expires: 1981-02-27
Abstract
No abstract record available.
Inventors
- 👤 Peters Walter Ernest
- 👤 Mills Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:08
CPC Classifications
F; F22; F22D; F22D1/00; F22D1/32; F01; F01K; F01K7/00; F01K7/34; F01K7/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1857865A
Cited
US2979443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |