US2531136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control arrangement for refrigerating systems
Assignee: General Electric Co
•
Filing: 1949-12-28
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Granted: 1950-11-21
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Expires: 1969-12-28
Abstract
No abstract record available.
Inventors
- 👤 Lowell M Kurtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:42
CPC Classifications
F; F25; F25B; F25B5/00; F25B5/04; F25B2400/00; F25B2400/05; F25B2400/052; F25B2400/054; F25B2700/00; F25B2700/21; F25B2700/2117; F25D; F25D11/00; F25D2700/00; F25D2700/12; F25D2700/123
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) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |