US2768506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined unloading and reversing valve for reversible refrigerating system
Assignee: General Electric Co
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Filing: 1954-10-06
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Granted: 1956-10-30
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Expires: 1974-10-06
Abstract
No abstract record available.
Inventors
- 👤 Dallas E Cain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:03
CPC Classifications
F; F25; F25B; F25B13/00; F25B41/00; F25B41/20; F25B41/26; F25B2600/00; F25B2600/02; F25B2600/026; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87708; Y10T137/87764
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |