Patent US3295918A successfully refreshed from Google Patents.
US3295918A
Expired / Lapsed
US
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Method of treating exhaust gases
Assignee: WR Grace and Co
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Filing: 1962-09-06
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Granted: 1967-01-03
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Expires: 1982-09-06
Abstract
No abstract record available.
Inventors
- 👤 Warren S Briggs
- 👤 William A Stover
- 👤 John L Warthen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:23
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8933; B01J23/8993; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A METHOD FOR TREATING EXHAUST GASES OF INTERNAL COMBUSTION ENGINES TO OXIDIZE THE POLLUTANTS THEREIN WHICH COMPRISES MIXING AN OXYGEN CONTAINING GAS WITH SAID EXHAUST GASES AND PASSING SAID MIXTURE THROUGH A BED OF A CATALYST COMPRISING 2 TO 12 WEIGHT PERCENT COPPER OXIDE, 2 TO 18 WEIGHT PERCENT MANGANESE DIOXIDE, 1 TO 20 WEIGHT PERCENT CHROMIC OXIDE AND ABOUT 0.0025 TO 0.4 WEIGHT PERCENT PALLADIUM, IMPREGNATED ON A POROUS, HIGH SURFACE AREA BASE, AND PASSING THE THUS TREATED GASES TO THE ATMOSPHERE.
Claim 2
Independent Claim
83 words
A METHOD FOR TREATING EXHAUST GASES OF INTERNAL COMBUSTION ENGINES TO OXIDIZE THE POLLUTANTS THEREIN WHICH COMPRISES MIXING AN OXYGEN CONTAINING GAS WITH SAID EXHAUST GASES AND PASSING SAID MIXTURE THROUGH A BED OF A CATALYST COMPRISING 2 TO 12 WEIGHT PERCENT COPPER OXIDE, 2 TO 18 WEIGHT PERCENT MANGANESE DIOXIDE, 1 TO 20 WEIGHT PERCENT CHROMIC OXIDE AND ABOUT 0.0025 TO 0.4 WEIGHT PERCENT PALLADIUM, IMPREGNATED ON A POROUS, HIGH SURFACE AREA BASE, AND PASSING THE THUS TREATED GASES TO THE ATMOSPHERE.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |