Patent US1795699A successfully refreshed from Google Patents.
Patent US2689466A successfully refreshed from Google Patents.
US2689466A
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Absorption refrigeration unit with a centrifugal separator
Assignee: Servel Inc
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Filing: 1951-06-30
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Granted: 1954-09-21
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Expires: 1971-06-30
Abstract
No abstract record available.
Inventors
- 👤 Eugene P Whitlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:27
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/06; F25B41/00; F25B2333/00; F25B2333/007; 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)
US417774A
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US482694A
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US553681A
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US630023A
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US948062A
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US1077947A
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US2193209A
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US2365797A
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US2352814A
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US2337439A
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US2370629A
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US2473602A
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US2565943A
Cited
US2485844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |