US3230034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating exhaust gases of internal combustion engines
Assignee: EIDP Inc
•
Filing: 1960-09-29
•
Granted: 1966-01-18
•
Expires: 1980-09-29
Abstract
No abstract record available.
Inventors
- 👤 Alvin B Stiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:59
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J27/19; B01J27/192; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01D2251/00; B01D2251/10; B01D2251/102; B01D2255/00; B01D2255/20; B01D2255/204; B01D2255/2047; B01D2255/207; B01D2255/20761; B01D2255/20784; B01D2255/20792; B01D2255/90; B01D2255/92; B01D2255/9202
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A PROCESS FOR THE TREATMENT OF AUTOMOBILE EXHAUST GASES THE STEP COMPRISING PASSING SAID GASES TOGETHER WITH AIR OVER A CATALYST MADE UP OF AGGREGATES OF CRYSTALLITES NO LARGER THAN 1500 ANGSTROMS OF A CATALYTIC MATERIAL SUITABLE FOR CATLYZING THE OXIDATION OF SAID GASES, THE SAID AGGREGATES HAVING BEEN KEPT APART BY CRYSTALLITES OF SIMILAR SIZE OF A REFRACTORY WHICH MELTS ABOVE 1000*C., THE AGGREGATES THUS CONSTITUTED HAVING BEEN HEATED TO 200-500*C. UNTIL COMPONENTS WHICH DECOMPOSE IN THIS RANGE HAVE BEEN DECOMPOSED AND THEREAFTER HAVING ADDED THERETO CRYSTALLITES OF SIMILAR SIZE OF A REFRACTORY WHICH MELTS ABOVE 1000*C. THUS TO FORM A CATALYTIC AGGREGATE WHICH IS STABILIZED AGAINST CRYSTALLITE GROWTH AT HIGH TEMPERATURES.
Claim 2
Dependent Claim
114 words
IN A PROCESS FOR THE TREATMENT OF AUTOMOBILE EXHAUST GASES THE STEP COMPRISING PASSING SAID GASES TOGETHER WITH AIR OVER A CATALYST MADE UP OF AGGREGATES OF CRYSTALLITES NO LARGER THAN 1500 ANGSTROMS OF A CATALYTIC MATERIAL SUITABLE FOR CATLYZING THE OXIDATION OF SAID GASES, THE SAID AGGREGATES HAVING BEEN KEPT APART BY CRYSTALLITES OF SIMILAR SIZE OF A REFRACTORY WHICH MELTS ABOVE 1000*C., THE AGGREGATES THUS CONSTITUTED HAVING BEEN HEATED TO 200-500*C. UNTIL COMPONENTS WHICH DECOMPOSE IN THIS RANGE HAVE BEEN DECOMPOSED AND THEREAFTER HAVING ADDED THERETO CRYSTALLITES OF SIMILAR SIZE OF A REFRACTORY WHICH MELTS ABOVE 1000*C. THUS TO FORM A CATALYTIC AGGREGATE WHICH IS STABILIZED AGAINST CRYSTALLITE GROWTH AT HIGH TEMPERATURES.
References Cited (Backward Citations)
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US2031475A
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GB413967A
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US2855370A
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US2941958A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |