Patent US3025133A successfully refreshed from Google Patents.
US3025133A
Expired / Lapsed
US
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Method for treating exhaust from an internal combustion engine operated on leaded fuel
Assignee: Minerals and Chemicals Philipp Corp
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Filing: 1959-10-12
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Granted: 1962-03-13
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Expires: 1979-10-12
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Robinson
- 👤 Charles A Specht
- 👤 Charles G Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:55
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A METHOD OF TREATING EXHAUST VAPORS FROM AN INTERNAL COMBUSTION ENGINE OPERATED ON LEADED FUEL TO REMOVE UNDESIRABLE CONTINUENTS FROM SAID VAPORS WHICH COMPRISES CONTACTING EXHAUST VAPORS CONTAINING LEAD SALT COMPOUNDS AND NOXIOUS OXIDIZABLE COMPOUNDS WITH GRANULES OF AN ALUMINOSILICATE WHICH HAD PREVIOUSLY BEEN REACTED WITH PHOSPHORIC ACID, THEREBY TO CONVERT SAID LEAD COMPOUNDS INTO LEAD-BEARING MATERIALS OF LOW VOLATILITY, THEN CONTACTING SAID EXHAUST VAPORS WITH AN OXIDATION CATALYST IN THE PRESENCE OF A QUANTITY OF OXYGEN SUFFICIENT TO OXIDIZE NOXIOUS OXIDIZABLE COMPONENTS THEREOF, SAID CATALYST BEING ONE THAT IS SUSCEPTIBLE TO LOSS OF CATALYTIC ACTIVITY IN THE PRESENCE OF LEAD COMPOUNDS, AND PASSING VAPORS THUS TREATED INTO THE ATMOSPHERE.
Claim 2
Independent Claim
110 words
A METHOD OF TREATING EXHAUST VAPORS FROM AN INTERNAL COMBUSTION ENGINE OPERATED ON LEADED FUEL TO REMOVE UNDESIRABLE CONTINUENTS FROM SAID VAPORS WHICH COMPRISES CONTACTING EXHAUST VAPORS CONTAINING LEAD SALT COMPOUNDS AND NOXIOUS OXIDIZABLE COMPOUNDS WITH GRANULES OF AN ALUMINOSILICATE WHICH HAD PREVIOUSLY BEEN REACTED WITH PHOSPHORIC ACID, THEREBY TO CONVERT SAID LEAD COMPOUNDS INTO LEAD-BEARING MATERIALS OF LOW VOLATILITY, THEN CONTACTING SAID EXHAUST VAPORS WITH AN OXIDATION CATALYST IN THE PRESENCE OF A QUANTITY OF OXYGEN SUFFICIENT TO OXIDIZE NOXIOUS OXIDIZABLE COMPONENTS THEREOF, SAID CATALYST BEING ONE THAT IS SUSCEPTIBLE TO LOSS OF CATALYTIC ACTIVITY IN THE PRESENCE OF LEAD COMPOUNDS, AND PASSING VAPORS THUS TREATED INTO 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) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |