Patent US2993178A successfully refreshed from Google Patents.
US2993178A
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Blocking oscillator having selectively adjustable r-c circuit
Assignee: Siemens Reiniger Werke AG
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Filing: 1956-03-05
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Granted: 1961-07-18
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Expires: 1976-03-05
Abstract
No abstract record available.
Inventors
- 👤 Burger Harald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:34
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/1206; H; H03; H03B; H03B5/00; H03B5/08; H03B5/10; A61B2018/00636; A61B2018/0066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1621034A
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US1632054A
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US1695485A
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US1724508A
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US2396439A
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US2622200A
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US2593501A
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US2611365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |