Patent US3299285A successfully refreshed from Google Patents.
US3299285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-phase computer systems
Assignee: Control Data Corp
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Filing: 1963-04-12
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Granted: 1967-01-17
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Expires: 1983-04-12
Abstract
No abstract record available.
Inventors
- 👤 John W Cannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:01
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H03K3/289; H03K19/00; H03K19/007; H03K19/0075
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A DIGITAL COMPUTER AT LEAST ONE LOGIC BLOCK, SAID LOGIC BLOCK INCLUDING AT LEAST A FIRST BISTABLE DEVICE AND A SECOND BISTABLE DEVICE, MEANS COUPLING THE OUTPUT SIGNALS OF SAID FIRST BISTABLE DEVICE TO SAID SECOND BISTABLE DEVICE, A FIXED REFERENCE VOLTAGE LEVEL IN SAID SECOND BISTABLE DEVICE, MEANS COUPLING DIRECTIVE SET AND RESET SIGNALS TO SAID FIRST BISTABLE DEVICE, MEANS COUPLING A CLOCK SIGNAL TO SAID FIRST BISTABLE DEVICE, SAID CLOCK SIGNAL ALTERNATING ABOUT SAID FIXED REFERENCE LEVEL WHEREBY SAID FIRST BISTABLE DEVICE BECOMES RESPONSIVE TO ONE OF SAID DIRECTIVE SIGNALS ONLY WHEN SAID CLOCK SIGNAL FALLS BELOW SAID FIXED REFERENCE LEVEL, AND SAID SECOND BISTABLE DEVICE BECOMES RESPONSIVE TO ONE OF SAID OUTPUT SIGNALS FROM SAID FIRST BISTABLE DEVICE ONLY WHEN SAID CLOCK SIGNAL EXCEEDS SAID FIXED REFERENCE LEVEL.
Claim 2
Dependent Claim
132 words
IN A DIGITAL COMPUTER AT LEAST ONE LOGIC BLOCK, SAID LOGIC BLOCK INCLUDING AT LEAST A FIRST BISTABLE DEVICE AND A SECOND BISTABLE DEVICE, MEANS COUPLING THE OUTPUT SIGNALS OF SAID FIRST BISTABLE DEVICE TO SAID SECOND BISTABLE DEVICE, A FIXED REFERENCE VOLTAGE LEVEL IN SAID SECOND BISTABLE DEVICE, MEANS COUPLING DIRECTIVE SET AND RESET SIGNALS TO SAID FIRST BISTABLE DEVICE, MEANS COUPLING A CLOCK SIGNAL TO SAID FIRST BISTABLE DEVICE, SAID CLOCK SIGNAL ALTERNATING ABOUT SAID FIXED REFERENCE LEVEL WHEREBY SAID FIRST BISTABLE DEVICE BECOMES RESPONSIVE TO ONE OF SAID DIRECTIVE SIGNALS ONLY WHEN SAID CLOCK SIGNAL FALLS BELOW SAID FIXED REFERENCE LEVEL, AND SAID SECOND BISTABLE DEVICE BECOMES RESPONSIVE TO ONE OF SAID OUTPUT SIGNALS FROM SAID FIRST BISTABLE DEVICE ONLY WHEN SAID CLOCK SIGNAL EXCEEDS SAID FIXED REFERENCE LEVEL.
References Cited (Backward Citations)
US3247399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |