US3259453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for treating exhaust gases of internal combustion engines
Assignee: EIDP Inc
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Filing: 1962-07-19
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Granted: 1966-07-05
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Expires: 1982-07-19
Abstract
No abstract record available.
Inventors
- 👤 Alvin B Stiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:37
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
IN A PROCESS FOR TREATMENT OF AUTOMOBILE EXHAUST GASES PRODUCED BY BURNING LEADED GASOLINE THE STEP COMPRISING PASSING SAID GASES INTO CONTACT WITH A SCAVENGER SELECTED FROM THE GROUP CONSISTING OF THE SULFATES OF AMMONIA, SODIUM, POTASSIUM, LITHIUM, AND MAGNESIUM, AND PASSING THE GASES INTO CONTACT WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF MANGANO-CHROMIA-MANGANITE OXIDES, CHROMITES, MANGANITES OF COPPER, IRON, COBALT, NICKEL, CADMIUM, ZINC, BISMUTH AND CERIUM AND PRECIOUS METAL CATALYSTS SELECTED FROM THE GROUP CONSISTING OF PLATINUM, RHODIUM, PALLADIUM AND RUTHENIUM.
References Cited (Backward Citations)
US3025133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |