US2581956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration control device
Assignee: U S THERMO CONTROL CO
•
Filing: 1948-06-07
•
Granted: 1952-01-08
•
Expires: 1968-06-07
Abstract
No abstract record available.
Inventors
- 👤 Frederick M Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:22
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/025; F25B41/00; F25B41/20; F25B41/22; F25B2500/00; F25B2500/26; F25B2600/00; F25B2600/02; F25B2600/025; F25B2600/0251
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1437750A
Cited
US2318933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |