US2943907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making magnetic recordings
Assignee: International Business Machines Corp
•
Filing: 1954-04-16
•
Granted: 1960-07-05
•
Expires: 1974-04-16
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Dickinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:12
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/491; G06F7/498; G06F7/4981; G06K; G06K1/00; G06K1/12; G06K1/126; G06K19/00; G06K19/06; G06K19/06009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1452032A
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US1452339A
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US2080273A
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US2168402A
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US2247905A
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US2699498A
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US2560474A
Cited
US2624850A
Cited
FR986551A
Cited
US2596621A
Cited
US2784392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |