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US3016310A
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Magnetic record device and method of preparing it
Assignee: AT&T Inc
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Filing: 1959-01-05
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Granted: 1962-01-09
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Expires: 1979-01-05
Abstract
No abstract record available.
Inventors
- 👤 Harold B Andrew
- 👤 Clement C Hipkins
- 👤 Le Roy M Towsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:11
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/84; G11B5/851; G11B5/004; G11B5/842; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
19 words
A MAGNETIC RECORDING SURFACE ONE MIL TO TWO MILS THICK COMPRISING 250 TO 1000 LAYERS OF A SINGLE MAGNETIC
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) | 1965-01-08 | 1965-07-10 | 1966-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-08 | 1969-07-10 | 1970-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-08 | 1973-07-10 | 1974-01-09 | $7700.00 | Window Closed / Lapsed |