US2154441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telegraph system
Assignee: Western Union Telegraph Co
•
Filing: 1935-06-18
•
Granted: 1939-04-18
•
Expires: 1955-06-18
Abstract
No abstract record available.
Inventors
- 👤 Humy Fernand E D
- 👤 Lawrence W Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:03
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/06; H04M11/062
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1942-04-17 | 1942-10-17 | 1943-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-17 | 1946-10-17 | 1947-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-17 | 1950-10-17 | 1951-04-18 | $7700.00 | Window Closed / Lapsed |