US2622171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bimetal strip thermostat
Assignee: Perma SA
•
Filing: 1950-03-18
•
Granted: 1952-12-16
•
Expires: 1970-03-18
Abstract
No abstract record available.
Inventors
- 👤 Hiltenbrand Charles Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:50
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1415050A
Cited
US1798854A
Cited
US2008163A
Cited
US2248676A
Cited
US2267387A
Cited
US2452508A
Cited
US2518595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |