Patent US2564221A successfully refreshed from Google Patents.
US2564221A
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US
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Electromagnetic motion responsive device
Assignee: Elsag Bailey Inc
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Filing: 1948-01-22
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Granted: 1951-08-14
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Expires: 1968-01-22
Abstract
No abstract record available.
Inventors
- 👤 Anthony J Hornfeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:34
CPC Classifications
G; G05; G05B; G05B1/00; G05B1/01; G05B1/02; G05B1/025; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/22; G01D5/225; G01D5/2258
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1891156A
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US1831142A
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US2302049A
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US2050629A
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US2420539A
Cited
US2437639A
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US2417049A
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US2430738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |