US3403239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetically-operated air-break, clapper-type high-voltage contactor
Assignee: Schneider Electric USA Inc
•
Filing: 1965-05-24
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Granted: 1968-09-24
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Expires: 1985-05-24
Abstract
No abstract record available.
Inventors
- 👤 Robert M Schramm
- 👤 Richard F Ptak
- 👤 David L Swindler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:01
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/10; H01H50/00; H01H50/54; H01H9/30; H01H9/34; H01H9/44
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) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |