US2608608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical relay system
Assignee: IPSOPHON PATENTGESELLSCHAFT A
•
Filing: 1947-01-28
•
Granted: 1952-08-26
•
Expires: 1967-01-28
Abstract
No abstract record available.
Inventors
- 👤 Handschin Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:59
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1662877A
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US2086913A
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US2092021A
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US2265203A
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US2333210A
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US2381250A
Cited
US2363753A
Cited
US2465794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |