US2568587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential transformer
Assignee: Automatic Temperature Control Co Inc
•
Filing: 1948-11-24
•
Granted: 1951-09-18
•
Expires: 1968-11-24
Abstract
No abstract record available.
Inventors
- 👤 William D Macgeorge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:20
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/08; H01F29/10; Y; Y10; Y10S; Y10S33/00; Y10S33/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2082121A
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US2358520A
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US2450868A
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US2448028A
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US2427866A
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US2459210A
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US2475611A
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US2430757A
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US2469137A
Cited
US2507344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |