US2684335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation inhibitor
Assignee: Standard Oil Development Co
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Filing: 1951-06-22
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Granted: 1954-07-20
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Expires: 1971-06-22
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Heinrich
- 👤 Albert J Shmidl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:09
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2493; C10M; C10M1/00; C10M1/08; C10M2219/00; C10M2219/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
AN IMPROVED COMPOSITION RESISTANT TO OXIDATION CONSISTING OF A PETROLEUM HYDROCARBON FRACTION SUSCEPTIBLE TO OXIDATION CONTAINING A MINOR AMOUNT OF THE REACTION PRODUCT OF DIPHENYL AMINE AND TRITHIOACETONE, SAID REACTANTS BEING REACTED IN A WEIGHT RATIO OF 51 PARTS AND 22 PARTS, RESPECTIVELY, AT A TEMPERATURE IN THE RANGE OF 165* TO 175* F. FOR A PERIOD OF ABOUT 4 HOURS, SAID MINOR AMOUNT OF THE REACTION PRODUCT BEING IN THE RANGE OF 0.5% BY WEIGHT TO 5.0% BY WEIGHT OF THE HYDROCARBON FRACTION.
Claim 2
Dependent Claim
84 words
AN IMPROVED COMPOSITION RESISTANT TO OXIDATION CONSISTING OF A PETROLEUM HYDROCARBON FRACTION SUSCEPTIBLE TO OXIDATION CONTAINING A MINOR AMOUNT OF THE REACTION PRODUCT OF DIPHENYL AMINE AND TRITHIOACETONE, SAID REACTANTS BEING REACTED IN A WEIGHT RATIO OF 51 PARTS AND 22 PARTS, RESPECTIVELY, AT A TEMPERATURE IN THE RANGE OF 165* TO 175* F. FOR A PERIOD OF ABOUT 4 HOURS, SAID MINOR AMOUNT OF THE REACTION PRODUCT BEING IN THE RANGE OF 0.5% BY WEIGHT TO 5.0% BY WEIGHT OF THE HYDROCARBON FRACTION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |