US3072457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of catalytically purifying exhaust gases of internal combustion engines and regenerating the lead-contaminated catalyst
Assignee: Universal Oil Products Co
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Filing: 1960-05-31
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Granted: 1963-01-08
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Expires: 1980-05-31
Abstract
No abstract record available.
Inventors
- 👤 Herman S Bloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:38
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2093; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/92; B01D53/94; B01D53/944; B01J; B01J23/00; B01J23/90; F01N13/00; F01N13/009; F01N13/0097; F01N3/206; F01N3/22; F01N3/24; F01N3/30; F01N3/32; F01N3/36; F01N2260/00; F01N2260/04; F01N2570/00; F01N2570/02; F01N2610/00; F01N2610/03; F01N2610/04; F02; F02B; F02B2720/00; F02B2720/15; F02B2720/157; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
48 words
IN THE CATALYTIC OXIDATION OF LEAD-CONTAINING EXHAUST GASES EMANATING FROM AN INTERNAL COMBUSTION ENGINE USING LEADED FUEL INCLUDING THE STEPS OF ADMIXING SECONDARY AIR WITH SAID EXHAUST GASES AND SUBJECTING THE RESULTANT MIXTURE TO CONTACT WITH A SOLID OXIDATION CATALYST, THE OXIDIZING ACTIVITY OF THE CATALYST BECOMING THERE-
References Cited (Backward Citations)
GB411377A
Cited
US2772147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |