US2742568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level regulating means
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1952-05-21
•
Granted: 1956-04-17
•
Expires: 1972-05-21
Abstract
No abstract record available.
Inventors
- 👤 Mansson Carl Gustaf Olof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:07
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/10; H04B3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1449382A
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US1956582A
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US2059594A
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US2298657A
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US2308752A
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US2357405A
Cited
US2423263A
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US2523401A
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US2560709A
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US2507695A
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US2542160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |