Patent US2508646A successfully refreshed from Google Patents.
US2508646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone subscriber's individual switches operated in hunting operations on both incoming and outgoing calls to complete connections
Assignee: Individual
•
Filing: 1945-05-03
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Granted: 1950-05-23
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Expires: 1965-05-03
Abstract
No abstract record available.
Inventors
- 👤 Marble Clarence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:38
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1705462A
Cited
US1569006A
Cited
US1799532A
Cited
US1951134A
Cited
US2228297A
Cited
US2239329A
Cited
US2332878A
Cited
US2354660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |