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US2559746A
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US
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Arrangement for night watchman controls
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1949-04-15
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Granted: 1951-07-10
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Expires: 1969-04-15
Abstract
No abstract record available.
Inventors
- 👤 Ahlberg Lars Folke Bertil
- 👤 Sundberg Sven Torvald Fredrik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:07
CPC Classifications
G; G07; G07C; G07C1/00; G07C1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |