US2598098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone call distributing system
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1946-08-24
•
Granted: 1952-05-27
•
Expires: 1966-08-24
Abstract
No abstract record available.
Inventors
- 👤 Harvey W Balzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:15
CPC Classifications
H; H04; H04Q; H04Q3/00; H04M; H04M3/00; H04M3/42; H04M3/50; H04M3/51; H04M3/523
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1802179A
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US1866593A
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US2233282A
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US2249486A
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US2249516A
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US2249362A
Cited
US2293611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |