US2441679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording apparatus
Assignee: Lear Inc
•
Filing: 1945-05-28
•
Granted: 1948-05-18
•
Expires: 1965-05-28
Abstract
No abstract record available.
Inventors
- 👤 Willard H Wade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:06
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/1883; G11B15/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1665784A
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US1933807A
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US1863066A
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US1997692A
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FR698262A
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DE633160C
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DE683462C
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US2248790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |