Patent US3510591A successfully refreshed from Google Patents.
US3510591A
Expired / Lapsed
US
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Control for an automatic reveille alarm device in telephone systems
Assignee: International Standard Electric Corp
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Filing: 1966-06-01
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Granted: 1970-05-05
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Expires: 1986-06-01
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:57
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/432
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US584173A
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US1227523A
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US1302767A
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US2483214A
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US2856461A
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US2901542A
Cited
US3046339A
Cited
DE1096429B
Cited
GB915212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |