US3501898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emitting electrode assembly for electrostatic precipitators
Assignee: Svenska Flaktfabriken AB
•
Filing: 1966-03-03
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Granted: 1970-03-24
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Expires: 1986-03-03
Abstract
No abstract record available.
Inventors
- 👤 Bengt Lindholm
- 👤 Gosta Mildh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:29
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/86; Y; Y10; Y10S; Y10S24/00; Y10S24/30; Y10S24/43; Y10S24/49
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1572347A
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DE503495C
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DE517262C
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FR980435A
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US2708980A
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US2708488A
Cited
US2874802A
Cited
US2870861A
Cited
US2867286A
Cited
US3027970A
Cited
GB1016905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |