US2952010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording and reproducing system
Assignee: International Business Machines Corp
•
Filing: 1957-12-30
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Granted: 1960-09-06
•
Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 Frederick M Demer
- 👤 William W Dodge
- 👤 Norman S Stockdale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:14
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/43; G06; G06K; G06K13/00; G06K13/18; G06K13/26; G06K13/28; G11B15/1808; G11B15/56; G11B15/58; G11B15/60; G11B5/00; G11B5/48; G11B5/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2648589A
Cited
US2778634A
Cited
US2792217A
Cited
US2814676A
Cited
US2815907A
Cited
US2849531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |