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Patent US3436725A successfully refreshed from Google Patents.
US3436725A
Expired / Lapsed
US
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Loop detector
Assignee: Cooper Industries LLC
•
Filing: 1966-01-03
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Granted: 1969-04-01
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Expires: 1986-01-03
Abstract
No abstract record available.
Inventors
- 👤 Walter R Spofford
- 👤 Morton G Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:45
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/01; G08G1/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1950741A
Cited
US2983852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |