US3440800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for purifying exhaust gas by means of electric filters
Assignee: GREGORI MESSEN JASCHIN
•
Filing: 1967-05-03
•
Granted: 1969-04-29
•
Expires: 1987-05-03
Abstract
No abstract record available.
Inventors
- 👤 Gregori Messen-Jaschin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:02
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/04; B03C3/14; B03C3/10; B03C3/34; B03C3/36; F; F01; F01N; F01N3/00; F01N3/08; F01N3/0892; Y; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191100142A
Cited
US1329859A
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US1456044A
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US2094531A
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US2119297A
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US2448048A
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US2659449A
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US2661076A
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US2841242A
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US3046716A
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US3238702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |