Patent US2742350A successfully refreshed from Google Patents.
US2742350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antioxidant composition and use
Assignee: Ethyl Corp
•
Filing: 1953-01-26
•
Granted: 1956-04-17
•
Expires: 1973-01-26
Abstract
No abstract record available.
Inventors
- 👤 Pree David O De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:20
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PETROLEUM HYDROCARBON FUEL FOR USE IN INTERNAL COMBUSTION ENGINES STABLE TO OXIDATION, CONSISTING ESSENTIALLY OF A LIQUID HYDROCARBON FUEL NORMALLY TENDING TO DETERIORATE BY CONTACT WITH OXYGEN AND, IN QUANTITY SUFFICIENT TO INHIBIT SUCH DETERIORATION, AN ANTIOXIDANT COMPOSITION THAT IS ESSENTIALLY A MIXTURE OF FROM 30 TO 70% BY WEIGHT OF 4-AMINODIPHENYLAMINE, 30 TO 70% BY WEIGHT OF 2-AMINODIPHENYLAMINE AND 0 TO 20% BY WEIGHT OF 2,4-DIAMINODIPHENYLAMINE.
Claim 2
Dependent Claim
68 words
A PETROLEUM HYDROCARBON FUEL FOR USE IN INTERNAL COMBUSTION ENGINES STABLE TO OXIDATION, CONSISTING ESSENTIALLY OF A LIQUID HYDROCARBON FUEL NORMALLY TENDING TO DETERIORATE BY CONTACT WITH OXYGEN AND, IN QUANTITY SUFFICIENT TO INHIBIT SUCH DETERIORATION, AN ANTIOXIDANT COMPOSITION THAT IS ESSENTIALLY A MIXTURE OF FROM 30 TO 70% BY WEIGHT OF 4-AMINODIPHENYLAMINE, 30 TO 70% BY WEIGHT OF 2-AMINODIPHENYLAMINE AND 0 TO 20% BY WEIGHT OF 2,4-DIAMINODIPHENYLAMINE.
References Cited (Backward Citations)
US2032787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |