US2622140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency control system for traffic signals
Assignee: Siemens Schweiz AG
•
Filing: 1948-02-27
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Granted: 1952-12-16
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Expires: 1968-02-27
Abstract
No abstract record available.
Inventors
- 👤 Muller Josef
- 👤 Patry Jean
- 👤 Baumberger Willy
- 👤 Klein Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:17
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/01; G08G1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1658953A
Cited
US1917243A
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US1898432A
Cited
US2031951A
Cited
US2238041A
Cited
US2290771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |