US2459299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic transducer with separable pole faces
Assignee: EFTEC North America LLC
•
Filing: 1946-07-20
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Granted: 1949-01-18
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Expires: 1966-07-20
Abstract
No abstract record available.
Inventors
- 👤 William P West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:36
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/21; G11B5/1272; G11B5/147; G11B5/153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE143240C
Cited
US1858553A
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US2098596A
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US2351003A
Cited
US2361752A
Cited
US2413108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-18 | 1952-07-19 | 1953-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-18 | 1956-07-19 | 1957-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-18 | 1960-07-19 | 1961-01-18 | $7700.00 | Window Closed / Lapsed |