Patent US1639546A successfully refreshed from Google Patents.
Patent US3155939A successfully refreshed from Google Patents.
US3155939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counter checking circuit
Assignee: Unisys Corp
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Filing: 1960-10-31
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Granted: 1964-11-03
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Expires: 1980-10-31
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Vadus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:55
CPC Classifications
H; H03; H03K; H03K21/00; H03K21/40
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
IN A SYSTEM WHEREIN COUNTS OF DATA PULSES ARE EMPLOYED IN A UTILIZATION CIRCUIT AND WHICH INCLUDES A 2NSTAGE COUNTER WITH FIRST AND SECOND N-STAGE SECTIONS CONNECTED IN SERIES AND A SOURCE OF DATA PULSES NORMALLY CONNECTED TO SUPPLY DATA PULSES TO THE INPUT OF THE FIRST COUNTER SECTION, A COMPARATOR FOR COMPARING SIGNALS SUPPLIED TO TWO INPUTS THEREOF AND FOR PROVIDING DIFFERENT OUTPUTS WHEN THE SIGNALS TO ITS TWO INPUTS ARE RESPECTIVELY ALIKE AND UNLIKE, MEANS FOR CONNECTING THE NTH-STAGE OUTPUTS OF SAID COUNTER SECTIONS TO SAID RESPECTIVE INPUTS OF THE COMPARATOR, SWITCH MEANS WHICH IN ONE MODE CONNECTS THE TWO COUNTER SECTIONS IN SERIES FOR NORMAL OPERA-
References Cited (Backward Citations)
US2919854A
Cited
US2854653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |