US2520873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manually operable thermostatic switch assembly
Assignee: F A SMITH MANUFACTURING Co
•
Filing: 1942-10-19
•
Granted: 1950-08-29
•
Expires: 1962-10-19
Abstract
No abstract record available.
Inventors
- 👤 Bean Frank Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:51
CPC Classifications
H; H01; H01H; H01H77/00; H01H77/02; H01H77/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1767709A
Cited
US2268229A
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US2262397A
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US2257793A
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US2293179A
Cited
US2300530A
Cited
US2348995A
Cited
US2348996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |