US2657982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synergistic antioxidant composition
Assignee: Ethyl Corp
•
Filing: 1949-12-24
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Granted: 1953-11-03
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Expires: 1969-12-24
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Hill
- 👤 Margaret L Welp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:01
CPC Classifications
C; C11; C11B; C11B5/00; C11B5/0092; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; C08K5/36; C08K5/37; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10M; C10M1/00; C10M1/08; C10L1/22; C10L1/222; C10L1/223; C10L1/2235; C10L1/24; C10L1/2406; C10L1/2418; C10L1/2443; C10L1/245; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2215/066; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/085; C10M2219/09; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A SYNERGISTIC ANTIOXIDANT COMPOSITION EFFECTIVE IN INHIBITING OXIDATION IN OXYGEN-SENSITIVE ORGANIC MATERIALS, SAID COMPOSITION CONSISTING ESSENTIALLY OF A LOWER ALKYL-P-PHENYLENE DIAMINE AND A SULFUR COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYL MERCAPTANS CONTAINING FROM 4 TO 12 CARBON ATOMS, FURFURYL MERCAPTAN, THE LOWER ALKYL ESTERS OF THIOGLYCOLIC ACID, 2-MERCAPTO IMIDAZOLIDINE AND LOWER ALKYL 2-MERCAPTO IMIDAZOLIDINES, SAID SULFUR COMPOUND BEING PERSENT IN AMOUNT BY WEIGHT BETWEEN ABOUT 25 PER CENT AND ABOUT 50 PER CENT OF SAID SYNERGISTIC ANTIOXIDANT COMPOUND.
Claim 2
Dependent Claim
80 words
A SYNERGISTIC ANTIOXIDANT COMPOSITION EFFECTIVE IN INHIBITING OXIDATION IN OXYGEN-SENSITIVE ORGANIC MATERIALS, SAID COMPOSITION CONSISTING ESSENTIALLY OF A LOWER ALKYL-P-PHENYLENE DIAMINE AND A SULFUR COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYL MERCAPTANS CONTAINING FROM 4 TO 12 CARBON ATOMS, FURFURYL MERCAPTAN, THE LOWER ALKYL ESTERS OF THIOGLYCOLIC ACID, 2-MERCAPTO IMIDAZOLIDINE AND LOWER ALKYL 2-MERCAPTO IMIDAZOLIDINES, SAID SULFUR COMPOUND BEING PERSENT IN AMOUNT BY WEIGHT BETWEEN ABOUT 25 PER CENT AND ABOUT 50 PER CENT OF SAID SYNERGISTIC ANTIOXIDANT COMPOUND.
References Cited (Backward Citations)
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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) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |