US2514577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recorder pole piece and assembly
Assignee: Individual
•
Filing: 1946-09-11
•
Granted: 1950-07-11
•
Expires: 1966-09-11
Abstract
No abstract record available.
Inventors
- 👤 Herman S Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:34
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/1278; G11B5/48; G11B5/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2044033A
Cited
US2098596A
Cited
US2185300A
Cited
US2229326A
Cited
US2181707A
Cited
US2270320A
Cited
US2361753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-10 | 1954-01-09 | 1954-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-10 | 1958-01-09 | 1958-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-10 | 1962-01-09 | 1962-07-11 | $7700.00 | Window Closed / Lapsed |