US2776548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical generators for absorption refrigeration units
Assignee: Individual
•
Filing: 1954-01-26
•
Granted: 1957-01-08
•
Expires: 1974-01-26
Abstract
No abstract record available.
Inventors
- 👤 Martiri Roberto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:34
CPC Classifications
F; F25; F25B; F25B33/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1853724A
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US1791441A
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US2215674A
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US2191551A
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US2337653A
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US2321060A
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US2580442A
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US2623366A
Cited
US2672737A
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US2721455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |