US3537829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for reducing the content of carbon monoxide in the exhaust gases from an internal combustion engine
Assignee: HIVAG HANDELS und IND VERWALTU
•
Filing: 1967-05-15
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Granted: 1970-11-03
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Expires: 1987-05-15
Abstract
No abstract record available.
Inventors
- 👤 Walter Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:31
CPC Classifications
F; F02; F02M; F02M29/00; F02M29/04; F02M25/00; F02M25/022; F02M25/0221; F02M25/0224; F02M27/00; F02M27/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1253266A
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US1282431A
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US1333838A
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US1394820A
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US1545649A
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US1771626A
Cited
US1663507A
Cited
US2701557A
Cited
US2645466A
Cited
US2705941A
Cited
US3110294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |