US2706752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head
Assignee: Individual
•
Filing: 1950-05-06
•
Granted: 1955-04-19
•
Expires: 1970-05-06
Abstract
No abstract record available.
Inventors
- 👤 Olin L Dupy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:02
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/29; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49055
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2563445A
Cited
US2229326A
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US2277305A
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FR884881A
Cited
US2503925A
Cited
US2523576A
Cited
US2549771A
Cited
US2543483A
Cited
CH262323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-18 | 1958-10-18 | 1959-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-18 | 1962-10-18 | 1963-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-18 | 1966-10-18 | 1967-04-19 | $7700.00 | Window Closed / Lapsed |