Patent US3538477A successfully refreshed from Google Patents.
US3538477A
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US
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Lever means,between protection means and switch contacts,for preventing resetting of operating mechanism if contacts are welded shut
Assignee: Allen Bradley Co LLC
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Filing: 1968-08-02
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Granted: 1970-11-03
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Expires: 1988-08-02
Abstract
No abstract record available.
Inventors
- 👤 Robert E Walters
- 👤 Gerd C Boysen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:59
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/14; H01H71/20; H01H71/205; H01H71/50; H01H71/501; H01H71/62; H01H73/00; H01H73/02; H01H73/18; H01H73/22; H01H73/30
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) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |