US2715721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal control circuit for coupling to metering system
Assignee: CONTROL INSTR CO Inc
•
Filing: 1949-11-05
•
Granted: 1955-08-16
•
Expires: 1969-11-05
Abstract
No abstract record available.
Inventors
- 👤 Eric R Behn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:29
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2443189A
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US2544790A
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US2586169A
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US2520476A
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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) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |