US2494401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for counting persons ascending and descending a flight of steps
Assignee: Individual
•
Filing: 1946-08-28
•
Granted: 1950-01-10
•
Expires: 1966-08-28
Abstract
No abstract record available.
Inventors
- 👤 Meuriot Paul Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:40
CPC Classifications
G; G06; G06M; G06M3/00; G06M3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US315355A
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US432003A
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US480526A
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US784216A
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US876064A
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US949299A
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US1039724A
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US1410292A
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US1822706A
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US2289750A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |