US2667756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-temperature refrigerating system
Assignee: General Electric Co
•
Filing: 1952-01-10
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Granted: 1954-02-02
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Expires: 1972-01-10
Abstract
No abstract record available.
Inventors
- 👤 Leonard W Atchison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:36
CPC Classifications
F; F25; F25B; F25B5/00; F25B5/04; F25B2400/00; F25B2400/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2133949A
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US2426578A
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US2471137A
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US2581956A
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US2576663A
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US2525560A
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US2604761A
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US2622407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |