US2609464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relay
Assignee: AT&T Inc
•
Filing: 1949-10-05
•
Granted: 1952-09-02
•
Expires: 1969-10-05
Abstract
No abstract record available.
Inventors
- 👤 John T L Brown
- 👤 Jr Charles E Pollard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:28
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/284; H01H1/00; H01H1/06; H01H1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |