US2967693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pellet type heat exchanger
Assignee: Alstom Power Inc
•
Filing: 1956-08-31
•
Granted: 1961-01-10
•
Expires: 1976-08-31
Abstract
No abstract record available.
Inventors
- 👤 John A Cunningham
- 👤 Andrew J Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:58
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1148331A
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US1533572A
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US1905883A
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US2379195A
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US2417393A
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US2458434A
Cited
US2639215A
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US2559069A
Cited
US2741603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |