US2457618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature regulated cooling circuit
Assignee: Sulzer AG
•
Filing: 1944-10-17
•
Granted: 1948-12-28
•
Expires: 1964-10-17
Abstract
No abstract record available.
Inventors
- 👤 Wiesendanger Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:41
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/14; F01P7/16; G; G05; G05D; G05D23/00; G05D23/185; G05D23/1858
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1318069A
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US1668817A
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US1228765A
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US1359198A
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US1616966A
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US1327148A
Cited
US1792520A
Cited
US1848987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |