Patent US3470532A successfully refreshed from Google Patents.
US3470532A
Expired / Lapsed
US
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Code checking circuit and multifrequency data receiver
Assignee: International Standard Electric Corp
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Filing: 1965-06-29
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Granted: 1969-09-30
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Expires: 1985-06-29
Abstract
No abstract record available.
Inventors
- 👤 Jean Victor Martens
- 👤 Marcel Clement Rene Natens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:37
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/44; H04Q1/444; H04Q1/45; H04Q1/453; H04L; H04L27/00; H04L27/26; H04L27/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2675538A
Cited
US2966659A
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US2784393A
Cited
US3238503A
Cited
US3128349A
Cited
US3143602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |