US2793344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic record testing means
Assignee: Individual
•
Filing: 1953-11-23
•
Granted: 1957-05-21
•
Expires: 1973-11-23
Abstract
No abstract record available.
Inventors
- 👤 Donald K Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/30; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1816; G11B20/20; G11B5/00; G11B5/62; G11B5/68; G11B5/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2528290A
Cited
US2528682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |