Patent US3530472A successfully refreshed from Google Patents.
US3530472A
Expired / Lapsed
US
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Cue signal communication system
Assignee: Kokusai Denki Electric Inc
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Filing: 1967-01-17
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Granted: 1970-09-22
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Expires: 1987-01-17
Abstract
No abstract record available.
Inventors
- 👤 Masao Fukata
- 👤 Yoshikazu Sato
- 👤 Shozo Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:45
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/16; G08C19/18; G04; G04G; G04G9/00; G04G9/0005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2392693A
Cited
US2422664A
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US2766381A
Cited
US2998595A
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US3210666A
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US3297889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |