Patent US3848603A successfully refreshed from Google Patents.
US2867974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat motor pump
Assignee: Bonthron & Ewing AB
•
Filing: 1952-04-22
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Granted: 1959-01-13
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Expires: 1972-04-22
Abstract
No abstract record available.
Inventors
- 👤 Wenander Harald Svenning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/36; F23D11/44; F23D2900/00; F23D2900/31021
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) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |