US2490064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermodynamic machine
Assignee: Individual
•
Filing: 1945-01-12
•
Granted: 1949-12-06
•
Expires: 1965-01-12
Abstract
No abstract record available.
Inventors
- 👤 Kollsman Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:58
CPC Classifications
F; F25; F25B; F25B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE181147C
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GB190623123A
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FR383966A
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US1256674A
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US1289960A
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GB141336A
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GB445550A
Cited
DE633985C
Cited
US2283176A
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US2256198A
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US2393338A
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US2382564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |