US3522702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Post-combustion purifier for thermal engines
Assignee: Automobiles Citroen SA
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Filing: 1968-11-14
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Granted: 1970-08-04
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Expires: 1988-11-14
Abstract
No abstract record available.
Inventors
- 👤 Albert Grosseau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:12
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/10; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/30; F01N3/34; Y; Y02; Y02A; Y02A50/00; Y02A50/20; 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) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |