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US2801792A
Expired / Lapsed
US
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Cooling of machine structures
Assignee: Svenska Rotor Maskiner AB
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Filing: 1950-09-13
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Granted: 1957-08-06
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Expires: 1970-09-13
Abstract
No abstract record available.
Inventors
- 👤 Lindhagen Teodor Immanuel
- 👤 Nilsson Hans Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:14
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/08; F04C18/082; F04C18/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL49126C
Cited
GB155241A
Cited
GB249534A
Cited
US2004563A
Cited
GB376162A
Cited
US2136117A
Cited
US2325617A
Cited
US2532721A
Cited
GB696640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |