US2484838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telegraph exchange system
Assignee: Western Union Telegraph Co
•
Filing: 1940-08-03
•
Granted: 1949-10-18
•
Expires: 1960-08-03
Abstract
No abstract record available.
Inventors
- 👤 George G Light
- 👤 William B Blanton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:02
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1681039A
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US2122367A
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US2023952A
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US2193967A
Cited
US2174731A
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US2193810A
Cited
US2193812A
Cited
US2143828A
Cited
US2227121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |