US2319339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signaling system
Assignee: AT&T Inc
•
Filing: 1940-05-22
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Granted: 1943-05-18
•
Expires: 1960-05-22
Abstract
No abstract record available.
Inventors
- 👤 Karl H Muller
- 👤 Ralph E Ressler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:36
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/44; H04Q1/444; H04Q1/45; H04Q1/453; H04Q1/4535
Claims Analysis
Total Claims: 0
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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) | 1946-05-17 | 1946-11-16 | 1947-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-05-17 | 1950-11-16 | 1951-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-05-17 | 1954-11-16 | 1955-05-18 | $7700.00 | Window Closed / Lapsed |