Patent US3418631A successfully refreshed from Google Patents.
US3418631A
Expired / Lapsed
US
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Error detection in paired selected ternary code trains
Assignee: AT&T Inc
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Filing: 1965-06-04
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Granted: 1968-12-24
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Expires: 1985-06-04
Abstract
No abstract record available.
Inventors
- 👤 Jack M Sipress
- 👤 Zarins Egils
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:52
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4917; H04L25/4923; H04L25/4925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN A PULSE COMMUNICATION SYSTEM WHEREIN A TRAIN OF UNIPOLAR MARKS AND SPACES IS CONVERTED INTO THREE STATE SIGNALS OF POSITIVE MARKS, NEGATIVE MARKS, AND SPACES SO THAT THE NUMBER OF CONSECUTIVE SPACES IS NOT MORE THAN TWO BY FIRST DIVIDING THE UNIPOLAR PULSE SIGNALS INTO TWO BIT BINARY WORDS AND THEN ENCODING THESE BINARY WORDS IN ACCORDANCE WITH THE FOLLOWING CODE
Claim 2
Dependent Claim
62 words
IN A PULSE COMMUNICATION SYSTEM WHEREIN A TRAIN OF UNIPOLAR MARKS AND SPACES IS CONVERTED INTO THREE STATE SIGNALS OF POSITIVE MARKS, NEGATIVE MARKS, AND SPACES SO THAT THE NUMBER OF CONSECUTIVE SPACES IS NOT MORE THAN TWO BY FIRST DIVIDING THE UNIPOLAR PULSE SIGNALS INTO TWO BIT BINARY WORDS AND THEN ENCODING THESE BINARY WORDS IN ACCORDANCE WITH THE FOLLOWING CODE
References Cited (Backward Citations)
US3061814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |