US2603689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detection of voltage or current variations in electric circuits
Assignee: Siemens Mobility Ltd
•
Filing: 1949-04-16
•
Granted: 1952-07-15
•
Expires: 1969-04-16
Abstract
No abstract record available.
Inventors
- 👤 Stevens Sydney Arthur
- 👤 Duckitt Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:41
CPC Classifications
G; G01; G01R; G01R17/00; G01R17/02; G01R17/04; G01R19/00; G01R19/10; G05; G05F; G05F1/00; G05F1/10; G05F1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1602882A
Cited
US2285482A
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US2485730A
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US2504996A
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US2466079A
Cited
US2480063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |