US3501756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated magnetic transducer with bobbin structure
Assignee: Atlantic Richfield Co
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Filing: 1968-03-05
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Granted: 1970-03-17
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Expires: 1988-03-05
Abstract
No abstract record available.
Inventors
- 👤 John P Woods
- 👤 Clifford D Dransfield
- 👤 Henry R Barta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:27
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/12; H01F41/127; G; G11; G11B; G11B5/00; G11B5/10; G11B5/105; G11B5/11; G11B5/127; G11B5/17; H01F5/00
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) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |