US2589569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system for use in light signals, indicators, and the like
Assignee: Siemens Mobility Ltd
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Filing: 1949-07-02
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Granted: 1952-03-18
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Expires: 1969-07-02
Abstract
No abstract record available.
Inventors
- 👤 Peter Leslie Hurst
- 👤 Sheppard Edward Alfred
- 👤 Stevens Sydney Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:05
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/305; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/32; G02B6/42; G02B6/4201; G02B6/4202; G02B6/4203; G02B6/4204; G02B6/4206; G02B6/36; G02B6/3616; G02B6/3624; Y; Y10; Y10S; Y10S116/00; Y10S116/15; Y10S385/00; Y10S385/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |