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Patent US2997233A successfully refreshed from Google Patents.
US2997233A
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Combined shift register and counter circuit
Assignee: Unisys Corp
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Filing: 1954-06-28
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Granted: 1961-08-22
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Expires: 1974-06-28
Abstract
No abstract record available.
Inventors
- 👤 Ernst S Selmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:05
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/30; G11; G11C; G11C19/00; G11C19/20; G11C19/202; H; H03; H03K; H03K23/00; H03K23/40; H03K23/50; H03K23/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2700502A
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US2703202A
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US2634052A
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US2700504A
Cited
US2844310A
Cited
US2591931A
Cited
US2767908A
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US2819840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |