Patent FR921713A successfully refreshed from Google Patents.
US2463409A
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Inert gas absorption refrigeration system, including a fan
Assignee: Hoover Co
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Filing: 1942-07-09
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Granted: 1949-03-01
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Expires: 1962-07-09
Abstract
No abstract record available.
Inventors
- 👤 Dwight L Moody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:42
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/10; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US591395A
Cited
US1568304A
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US1568305A
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US1819528A
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US1856765A
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US1869617A
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US1894359A
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FR751224A
Cited
US2156954A
Cited
US2240540A
Cited
US2283763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |