US2838635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch having automatic current overload protection
Assignee: Mechanical Products Inc
•
Filing: 1956-07-16
•
Granted: 1958-06-10
•
Expires: 1976-07-16
Abstract
No abstract record available.
Inventors
- 👤 Richard C Ingwersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:49
CPC Classifications
H; H01; H01H; H01H73/00; H01H73/22; H01H73/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1990122A
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US2187606A
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US2336408A
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US2433720A
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US2467653A
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GB614510A
Cited
US2541679A
Cited
US2468774A
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US2764650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |