Patent US2828392A successfully refreshed from Google Patents.
US2828392A
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US
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High voltage switching arrangement
Assignee: Individual
•
Filing: 1954-06-25
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Granted: 1958-03-25
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Expires: 1974-06-25
Abstract
No abstract record available.
Inventors
- 👤 Leopold Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:02
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/28; H01H33/30; H01H33/34; H01H33/04; H01H33/12; H01H33/121; H01H2033/306; H01H33/008; H01H33/14; H01H9/00; H01H9/0066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1898900A
Cited
US1912024A
Cited
US1904577A
Cited
US2686243A
Cited
US2447656A
Cited
US2723367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |