US2598392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gaseous tube selecting switch for use in automatic telephony
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1947-12-23
•
Granted: 1952-05-27
•
Expires: 1967-12-23
Abstract
No abstract record available.
Inventors
- 👤 Kaell Knut
- 👤 Hullegard Erik Waldemar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:06
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/14; H01J31/00; H01J31/02; H01J31/06; H03; H03K; H03K29/00; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/525
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |