US2689466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption refrigeration unit with a centrifugal separator
Assignee: Servel Inc
•
Filing: 1951-06-30
•
Granted: 1954-09-21
•
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 20:16
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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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 |