US3401394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic shunting recorder
Assignee: Digitronics Corp
•
Filing: 1964-04-03
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Granted: 1968-09-10
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Expires: 1984-04-03
Abstract
No abstract record available.
Inventors
- 👤 Leonard Eugene
- 👤 Wolf Edgar
- 👤 Francis C Marino
- 👤 Wolfgang F Heine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:16
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G06; G06K; G06K1/00; G06K1/12; G07F7/0806; G07F7/0833; G11; G11B; G11B20/00; G11B20/10
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) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |