US3013206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic reader
Assignee: 3M Co
•
Filing: 1958-08-28
•
Granted: 1961-12-12
•
Expires: 1978-08-28
Abstract
No abstract record available.
Inventors
- 👤 Robert J Youngquist
- 👤 Robert H Hanes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:56
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/44; G; G01; G01R; G01R33/00; G01R33/12; G01R33/1207; G03; G03G; G03G19/00; G06; G06K; G06K7/00; G06K7/08; G06K7/082; G09; G09G; G09G3/00; G09G3/001; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/74
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) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |