Patent US3231791A successfully refreshed from Google Patents.
US3231791A
Expired / Lapsed
US
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Locking means for electromagnetic relays
Assignee: Schneider Electric USA Inc
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Filing: 1963-06-06
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Granted: 1966-01-25
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Expires: 1983-06-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas Parris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:36
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/20; H01H9/28; H01H2300/00; H01H2300/06; H01H2300/066; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7005
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |