US2739451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system provided with compressor unloading mechanism
Assignee: Carrier Corp
•
Filing: 1952-09-30
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Granted: 1956-03-27
•
Expires: 1972-09-30
Abstract
No abstract record available.
Inventors
- 👤 Roger S Breck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:38
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/33; F25B41/335; F25B41/20; F25B41/24; F25B2341/00; F25B2341/06; F25B2341/062; F25B2600/00; F25B2600/25; F25B2600/2501; F25B2700/00; F25B2700/21; F25B2700/2104
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1054456A
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US1858517A
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US1965419A
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US2290984A
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US2363273A
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US2523451A
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US2666299A
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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) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |