Patent US2872971A successfully refreshed from Google Patents.
Patent US3553677A successfully refreshed from Google Patents.
US3553677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog to digital converter
Assignee: International Standard Electric Corp
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Filing: 1967-10-13
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Granted: 1971-01-05
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Expires: 1987-10-13
Abstract
Abstract THE PASSAGE OF A HIGH FIELD DOMAIN OF THE GUNN EFFECT THROUGH A SUITABLY GROOVED SEMICONDUCTOR. OR A SEMICONDUCTOR PROVIDED WITH ADDITIONAL CONTACT AREAS ON A MAJOR SURFACE THEREOF GENERATES A SERIES OF PULSES. IN A TAPERED, OF SUITABLY DOPED SEMICONDUCTOR. THE DOMAIN PROPAGATES FOR DISTANCE DEPENDENT ON THE MAGNITUDE OF APPLIED BIAS WHICH IS PROPORTIONAL TO THE ANALOG SIGNAL. THE NUMBER OF GROOVES OR ADDITIONAL CONTACT AREAS ARE ARRANGED IN THE SEQUENCE OF A CHAIN CODE OF N-DIGITS. THE CODE CHARACTER CORRESPONDING TO THE ANALOG SIGNAL THEN APPEARS SERIALLY IN THE LAST N-TIME SLOTS BEFORE THE DOMAIN IS EXTINGUISHED.
Inventors
- 👤 Kenneth William Cattermole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:17
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/34; H10; H10N; H10N80/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |