US2548941A
Expired / Lapsed
US
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Actuator for thermally responsive control devices
Assignee: Robertshaw Controls Co
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Filing: 1947-06-23
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Granted: 1951-04-17
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Expires: 1967-06-23
Abstract
No abstract record available.
Inventors
- 👤 Dan A Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:43
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0208; G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/021; G05D23/023; G05D23/024; G05D23/026; G05D23/027; Y; Y10; Y10S; Y10S236/00; Y10S236/05; Y10S236/11; Y10S33/00; Y10S33/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |