Patent US3432815A successfully refreshed from Google Patents.
US3432815A
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US
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Switching logic for a two-dimensional memory
Assignee: International Business Machines Corp
•
Filing: 1965-02-15
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Granted: 1969-03-11
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Expires: 1985-02-15
Abstract
No abstract record available.
Inventors
- 👤 Donald J Lem
- 👤 Wilhelm G Spruth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:58
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/14; G06F13/20; G06F13/22; G06F5/00; G06F5/06; G11; G11C; G11C21/00; G11C21/02; G11C21/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2902217A
Cited
US3065304A
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US3141153A
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US3185823A
Cited
US3302176A
Cited
US3316544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |