US2689894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contact means
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1952-06-03
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Granted: 1954-09-21
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Expires: 1972-06-03
Abstract
No abstract record available.
Inventors
- 👤 Wikstrom Joel Edvin
- 👤 Lundkvist Karl Axel
- 👤 Jorgensen Anders Ossian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:57
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54; H01H1/00; H01H1/12; H01H1/14; H01H1/24; H01H1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2120421A
Cited
US2585278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |