US2713676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording systems
Assignee: Monroe Calculating Machine Co
•
Filing: 1951-08-30
•
Granted: 1955-07-19
•
Expires: 1971-08-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard M Fleming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:59
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/0007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2296754A
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US2304738A
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US2257187A
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US2294627A
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US2351008A
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US2438217A
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US2456401A
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US2540654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-18 | 1959-01-17 | 1959-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-18 | 1963-01-17 | 1963-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-18 | 1967-01-17 | 1967-07-19 | $7700.00 | Window Closed / Lapsed |