Patent US2580220A successfully refreshed from Google Patents.
US2580220A
Expired / Lapsed
US
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Secondary refrigeration system
Assignee: General Electric Co
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Filing: 1948-05-25
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Granted: 1951-12-25
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Expires: 1968-05-25
Abstract
No abstract record available.
Inventors
- 👤 La Mar S Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:08
CPC Classifications
F; F25; F25D; F25D11/00; F25D11/02; F25D11/025; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2146796A
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US2292405A
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US2312861A
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US2386919A
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US2434361A
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US2426578A
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US2416777A
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US2471137A
Cited
US2455850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |