US2689465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporator and absorber unit for absorption refrigeration systems
Assignee: Servel Inc
•
Filing: 1951-06-30
•
Granted: 1954-09-21
•
Expires: 1971-06-30
Abstract
No abstract record available.
Inventors
- 👤 Mcneely Lowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:53
CPC Classifications
F; F25; F25B; F25B39/00; F25B39/02; F25B39/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1031885A
Cited
US1526605A
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US2323186A
Cited
US2399916A
Cited
US2568891A
Cited
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 |