US2599368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beam switching system
Assignee: AT&T Inc
•
Filing: 1948-05-10
•
Granted: 1952-06-03
•
Expires: 1968-05-10
Abstract
No abstract record available.
Inventors
- 👤 Bruce Edmond
- 👤 Gross Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:14
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/526
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2443643A
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US2477821A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |