US2419376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostatic control for refrigeration systems
Assignee: Penn Electric Switch Co
•
Filing: 1941-06-09
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Granted: 1947-04-22
•
Expires: 1961-06-09
Abstract
No abstract record available.
Inventors
- 👤 Burton E Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:55
CPC Classifications
F; F25; F25D; F25D31/00; F25D31/002; F25B; F25B49/00; F25B49/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1408744A
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US1605057A
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US1821702A
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US1960802A
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US1886042A
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US2133967A
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US2279888A
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US2303182A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-21 | 1950-10-21 | 1951-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-21 | 1954-10-21 | 1955-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-21 | 1958-10-21 | 1959-04-22 | $7700.00 | Window Closed / Lapsed |