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US2865505A
Expired / Lapsed
US
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Means for starting high frequency vibrations in filters with fine netting
Assignee: Rhewum GmbH
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Filing: 1955-06-06
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Granted: 1958-12-23
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Expires: 1975-06-06
Abstract
No abstract record available.
Inventors
- 👤 Bruninghaus Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:27
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/28; B07B1/34; B07B1/346
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1456067A
Cited
US1928812A
Cited
GB392778A
Cited
US2225967A
Cited
US2274914A
Cited
US2412840A
Cited
US2468949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |