US2874218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phasing system
Assignee: Western Union Telegraph Co
•
Filing: 1956-11-26
•
Granted: 1959-02-17
•
Expires: 1976-11-26
Abstract
No abstract record available.
Inventors
- 👤 Ii Samuel Gordon Allen
- 👤 Frank L Currie
- 👤 John J Mcmanus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/46; H02P5/52; H04; H04N; H04N1/00; H04N1/32; H04N1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2689273A
Cited
US2779820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |