US3482375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrofilter with corrugated sheet metal-type collecting electrodes
Assignee: Kloeckner Humboldt Deutz AG
•
Filing: 1968-06-28
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Granted: 1969-12-09
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Expires: 1988-06-28
Abstract
No abstract record available.
Inventors
- 👤 Karl Ellingen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:55
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/40; B03C3/45; B03C3/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
AT83347B
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DE431216C
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DE464858C
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US1956591A
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DE701416C
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US2672207A
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US2884087A
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GB835012A
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US2903089A
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US3362135A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |