Patent US2828123A successfully refreshed from Google Patents.
Patent US2536150A successfully refreshed from Google Patents.
US2536150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode system for trochotrons
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1949-07-18
•
Granted: 1951-01-02
•
Expires: 1969-07-18
Abstract
No abstract record available.
Inventors
- 👤 Backmark Nils Erik Gustav
- 👤 Jansson Karl Evert Ingemar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:10
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/02; H01J31/06; H01J21/00; H01J21/02; H01J21/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2293567A
Cited
US2414121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |