US3065305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Connecting device for private automatic branch exchanges
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1957-07-08
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Granted: 1962-11-20
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Expires: 1977-07-08
Abstract
No abstract record available.
Inventors
- 👤 Nilsson Nils Emil
- 👤 Rodnert Gustav Oscar
- 👤 Bjork John Carl Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:11
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/58; H04Q3/62; H04Q3/625; H04M; H04M1/00; H04M1/26; H04M1/30; H04M1/50; H04M3/00; H04M3/42; H04M3/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2405211A
Cited
US2438496A
Cited
US2554201A
Cited
US2697749A
Cited
US2713617A
Cited
US2885483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |