Patent US3533753A successfully refreshed from Google Patents.
US3533753A
Expired / Lapsed
US
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Catalyst for engine exhaust-gas reformation
Assignee: Individual
•
Filing: 1966-10-31
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Granted: 1970-10-13
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Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Heinz Berger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:46
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2825; F01N3/2828; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/92; B01D53/94; B01D53/944; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8933; B01J23/8986; B01J35/00; B01J35/30; B01J35/391; B01J35/395; F01N3/18; F01N3/20; F01N3/2006; F01N3/2013; B01J37/00; B01J37/0009; B01J37/0018; F01N2330/00; F01N2330/10; 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) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |