Patent US3450897A successfully refreshed from Google Patents.
US3450897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepping switch employing chain of logic gates having means for locking a gate in a given state
Assignee: RCA Corp
•
Filing: 1966-06-28
•
Granted: 1969-06-17
•
Expires: 1986-06-28
Abstract
No abstract record available.
Inventors
- 👤 William Henn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:14
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/027; H03K3/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN COMBINATION: A CHAIN OF LOGIC GATES INTERCONNECTED IN A RING AND CAPABLE OF PRODUCING OSCILLATIONS; MEANS FOR APPLYING A DISABLING SIGNAL TO ONE GATE FOR LOCKING THAT GATE IN A GIVEN STATE AND THEREBY PREVENTING SAID OSCILLATORS; AND AN OUTPUT GATE CONNECTED TO SAID CHAIN AND TO SAID MEANS AND NORMALLY PRODUCING AN OUTPUT REPRESENTING ONE BINARY VALUE, RECEPTIVE OF A SIGNAL COMPLEMENTARY TO SAID DISABLING SIGNAL, THE SIGNAL PRODUCED BY THE GATE LOCKED IN SAID GIVEN STATE AND THE SIGNAL PRODUCED BY A SECOND GATE IN SAID CHAIN FOR PRODUCING AN OUTPUT REPRESENTING THE OTHER BINARY VALUE WHEN THE THREE SIGNALS IT RECEIVES ARE OF THE SAME VALUE.
Claim 2
Dependent Claim
110 words
IN COMBINATION: A CHAIN OF LOGIC GATES INTERCONNECTED IN A RING AND CAPABLE OF PRODUCING OSCILLATIONS; MEANS FOR APPLYING A DISABLING SIGNAL TO ONE GATE FOR LOCKING THAT GATE IN A GIVEN STATE AND THEREBY PREVENTING SAID OSCILLATORS; AND AN OUTPUT GATE CONNECTED TO SAID CHAIN AND TO SAID MEANS AND NORMALLY PRODUCING AN OUTPUT REPRESENTING ONE BINARY VALUE, RECEPTIVE OF A SIGNAL COMPLEMENTARY TO SAID DISABLING SIGNAL, THE SIGNAL PRODUCED BY THE GATE LOCKED IN SAID GIVEN STATE AND THE SIGNAL PRODUCED BY A SECOND GATE IN SAID CHAIN FOR PRODUCING AN OUTPUT REPRESENTING THE OTHER BINARY VALUE WHEN THE THREE SIGNALS IT RECEIVES ARE OF THE SAME VALUE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |