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US2772544A
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Absorption refrigerating apparatus employing inert gas
Assignee: Bolinders Fabriks AB
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Filing: 1953-11-16
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Granted: 1956-12-04
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Expires: 1973-11-16
Abstract
No abstract record available.
Inventors
- 👤 Lenning Alvar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:42
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)
US2134149A
Cited
US2215674A
Cited
US2238138A
Cited
US2302091A
Cited
US2357612A
Cited
US2504784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |