US2942152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge gap protective device
Assignee: McGraw Edison Co
•
Filing: 1954-05-13
•
Granted: 1960-06-21
•
Expires: 1974-05-13
Abstract
No abstract record available.
Inventors
- 👤 Herman O Stoelting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:43
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/16; H01; H01T; H01T2/00; H01T2/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US495853A
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US1477305A
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US1477307A
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US1477304A
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US1477306A
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US1612354A
Cited
US2207577A
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US2335240A
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US2363898A
Cited
US2508954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |