US3543397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic memory assembly method
Assignee: AT&T Inc
•
Filing: 1967-02-13
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Granted: 1970-12-01
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Expires: 1987-02-13
Abstract
No abstract record available.
Inventors
- 👤 Bruce S Hoagland
- 👤 Bernard Kirschenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:55
CPC Classifications
G; G11; G11C; G11C5/00; G11C5/02; G11C5/04; G11C5/05; G11C11/00; G11C11/02; G11C11/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069; Y10T29/49826; Y10T29/49838
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3021507A
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US3068554A
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US3009010A
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US2910673A
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US3025502A
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US3196522A
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US3197746A
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US3293620A
Cited
US3391397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |