US3370419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for purification of the exhaust gases of internal combustion engines
Assignee: PAUL AUGUSTIN ALBERT KETZER
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Filing: 1966-06-27
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Granted: 1968-02-27
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Expires: 1986-06-27
Abstract
No abstract record available.
Inventors
- 👤 Ketzer Paul Augustin Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:03
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; F; F01; F01N; F01N3/00; F01N3/02; F01N3/037; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2013; F01N3/206; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/30; F02; F02M; F02M25/00; F02M27/00; F02M27/02; F01N2330/00; F01N2330/02; F01N2610/00; F01N2610/01; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |