US2708744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective signaling system
Assignee: Individual
•
Filing: 1951-04-12
•
Granted: 1955-05-17
•
Expires: 1971-04-12
Abstract
No abstract record available.
Inventors
- 👤 James T Neiswinter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:30
CPC Classifications
H; H01; H01H; H01H67/00; H01H67/22; H01H67/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1867209A
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US1970455A
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US2094733A
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US2176040A
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US2334574A
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US2406834A
Cited
US2419799A
Cited
US2485551A
Cited
US2446943A
Cited
US2534746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-16 | 1958-11-15 | 1959-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-16 | 1962-11-15 | 1963-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-16 | 1966-11-15 | 1967-05-17 | $7700.00 | Window Closed / Lapsed |