US2753489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching device
Assignee: Siemens and Halske AG
•
Filing: 1951-11-29
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Granted: 1956-07-03
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Expires: 1971-11-29
Abstract
No abstract record available.
Inventors
- 👤 Jacobi Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:38
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2056769A
Cited
US2044618A
Cited
US2195996A
Cited
US2481925A
Cited
US2441677A
Cited
US2481365A
Cited
US2508198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |