Patent US2598412A successfully refreshed from Google Patents.
US2598412A
Expired / Lapsed
US
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Switching system for communication of intelligence
Assignee: Individual
•
Filing: 1950-09-26
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Granted: 1952-05-27
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Expires: 1970-09-26
Abstract
No abstract record available.
Inventors
- 👤 Modee Gustav Vilhelm Gunnar
- 👤 Strandlund Jonas Harry
- 👤 Ek Folke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:28
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/43; C; C03; C03B; C03B13/00; C03B13/12; H01J31/00; H01J31/08; H01J31/26; H01J31/28; H01J31/34; H01J31/36; H04; H04Q; H04Q3/00; H04Q3/0004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
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 |