Patent US3530250A successfully refreshed from Google Patents.
US3530250A
Expired / Lapsed
US
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Telephone monitoring of remotely located areas
Assignee: Agfa Gevaert AG
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Filing: 1966-06-16
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Granted: 1970-09-22
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Expires: 1986-06-16
Abstract
No abstract record available.
Inventors
- 👤 Gustav Schaum
- 👤 Rudolf Kremp
- 👤 Johann Becker
- 👤 Fritz Hieber
- 👤 Hans-Peter Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:43
CPC Classifications
H; H04; H04M; H04M11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2542535A
Cited
US2539139A
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US2854512A
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US2801287A
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US2909614A
Cited
US2898405A
Cited
US2826636A
Cited
US3038965A
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 |