Patent US2849373A successfully refreshed from Google Patents.
US2849373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preventing color formation in gasoline
Assignee: American Oil Co
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Filing: 1955-03-31
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Granted: 1958-08-26
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Expires: 1975-03-31
Abstract
No abstract record available.
Inventors
- 👤 Miron Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:31
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN THE PROCESS OF IMPROVING THE OXIDATION STABILITY OF A HYDROCARBON OIL CONTAINING (1) A PHENOLIC COMPOUND, AND (2) A MEMBER OF THE CLASS CONSISTING OF ALKYLBENZENES, ALKYLCYCLOPARAFFINS, OLEFINS, CYCLOOLEFINS, DIOLEFINS AND CYCLODIOLEFINS, WHICH PROCESS COMPRISES ADDING TO SAID OIL, IN THE PRESENCE OF FREE-OXYGEN, A PHENYLENE DIAMINE INHIBITOR HAVING THE AMINO GROUPS N A NON-META ORIENTATION AND NOT MORE THAN ONE AMINO GROUP HAVING AN ALKYL SUBSTITUENT GROUP, SAID ALKYL GROUP HAVING NOT MORE THAN 16 CARBON ATOMS, WHICH PROCESS IS CHARACTERIZED BY THE FORMATION OF A PINKISH COLOR IN SAID OIL, THE IMPROVEMENT WHICH COMPRISES ADDING AN ALDEHYDE TO SAID OIL PRIOR TO THE FORMATION OF A SIGNIFICANT AMOUNT OF PINKISH COLOR, WHEREBY FURTHER FORMATION OF PINKISH COLOR IS PREVENTED.
Claim 2
Dependent Claim
122 words
IN THE PROCESS OF IMPROVING THE OXIDATION STABILITY OF A HYDROCARBON OIL CONTAINING (1) A PHENOLIC COMPOUND, AND (2) A MEMBER OF THE CLASS CONSISTING OF ALKYLBENZENES, ALKYLCYCLOPARAFFINS, OLEFINS, CYCLOOLEFINS, DIOLEFINS AND CYCLODIOLEFINS, WHICH PROCESS COMPRISES ADDING TO SAID OIL, IN THE PRESENCE OF FREE-OXYGEN, A PHENYLENE DIAMINE INHIBITOR HAVING THE AMINO GROUPS N A NON-META ORIENTATION AND NOT MORE THAN ONE AMINO GROUP HAVING AN ALKYL SUBSTITUENT GROUP, SAID ALKYL GROUP HAVING NOT MORE THAN 16 CARBON ATOMS, WHICH PROCESS IS CHARACTERIZED BY THE FORMATION OF A PINKISH COLOR IN SAID OIL, THE IMPROVEMENT WHICH COMPRISES ADDING AN ALDEHYDE TO SAID OIL PRIOR TO THE FORMATION OF A SIGNIFICANT AMOUNT OF PINKISH COLOR, WHEREBY FURTHER FORMATION OF PINKISH COLOR IS PREVENTED.
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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |