US2250438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensator for refrigeration control
Assignee: AUTOMATIC CONTROL Corp
•
Filing: 1937-08-20
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Granted: 1941-07-22
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Expires: 1957-08-20
Abstract
No abstract record available.
Inventors
- 👤 Lawrence M Persons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:18
CPC Classifications
F; F25; F25D; F25D31/00; F25D31/006; G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/27535; G05D23/27537; F25D2331/00; F25D2331/80; F25D2331/802
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-07-21 | 1945-01-20 | 1945-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-21 | 1949-01-20 | 1949-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-21 | 1953-01-20 | 1953-07-22 | $7700.00 | Window Closed / Lapsed |