Patent US3354267A successfully refreshed from Google Patents.
US3354267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential pcm system employing digital integration
Assignee: AT&T Inc
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Filing: 1965-01-13
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Granted: 1967-11-21
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Expires: 1985-01-13
Abstract
No abstract record available.
Inventors
- 👤 Theodore V Crater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:29
CPC Classifications
H; H03; H03M; H03M3/00; H03M3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN COMBINATION, A SOURCE OF A SERIES OF DIFFERENTIAL PCM CODE WORDS, A DIGITAL MEMORY CONNECTED TO SAID SOURCE FOR STORING SAID WORDS, READ-OUT MEANS CONNECTED TO SAID MEMORY FOR DELIVERING K CONSECUTIVE WORDS FROM SAID MEMORY EACH TIME A NEW WORD IN SAID SERIES IS RECEIVED FROM SAID SOURCE, AND ACCUMMULATING MEANS FOR FORMING THE WEIGHTED SUM OF SAID K WORDS TO PRODUCE AN ANALOG SIGNAL SAMPLE.
Claim 2
Dependent Claim
68 words
IN COMBINATION, A SOURCE OF A SERIES OF DIFFERENTIAL PCM CODE WORDS, A DIGITAL MEMORY CONNECTED TO SAID SOURCE FOR STORING SAID WORDS, READ-OUT MEANS CONNECTED TO SAID MEMORY FOR DELIVERING K CONSECUTIVE WORDS FROM SAID MEMORY EACH TIME A NEW WORD IN SAID SERIES IS RECEIVED FROM SAID SOURCE, AND ACCUMMULATING MEANS FOR FORMING THE WEIGHTED SUM OF SAID K WORDS TO PRODUCE AN ANALOG SIGNAL SAMPLE.
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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |