US3038857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricants containing additives
Assignee: Sunoco Inc
•
Filing: 1958-11-10
•
Granted: 1962-06-12
•
Expires: 1978-11-10
Abstract
No abstract record available.
Inventors
- 👤 Charles L Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:37
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/40; C10M2207/404; C10M2221/00; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR AMOUNT OF A LUBRICATING OIL AND A MINOR PROPORTION, SUFFICIENT TO IMPROVE THE SLUDGE DISPERSING AND CORROSION RESISTING PROPERTIES OF THE LUBRICATING OIL, OF SALTS OF OILSOLUBLE ALKYL AROMATIC SULFONIC ACIDS AND COPOLYMERS OF ALKYL ACRYLATES HAVING 8 TO 20 CARBON ATOMS IN THE ALKYL GROUP AND AMINOALKYL ACRYLATES HAVING UP TO 18 CARBON ATOMS IN THE AMINOALKYL GROUP, SAID COPOLYMER CONTAINING 5 TO 20 NITROGEN ATOMS PER MOLECULE, THE AMOUNT OF SULFONIC ACIDS RELATIVE TO THE POLYMER BEING IN THE RANGE FROM ONE PART BY WEIGHT OF SULFONIC ACIDS PER FIVE PARTS OF SAID COPOLYMER, TO AN AMOUNT SUFFICIENT TO NEUTRALIZE ALL THE AMINO GROUPS OF SAID COPOLYMER.
Claim 2
Dependent Claim
115 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR AMOUNT OF A LUBRICATING OIL AND A MINOR PROPORTION, SUFFICIENT TO IMPROVE THE SLUDGE DISPERSING AND CORROSION RESISTING PROPERTIES OF THE LUBRICATING OIL, OF SALTS OF OILSOLUBLE ALKYL AROMATIC SULFONIC ACIDS AND COPOLYMERS OF ALKYL ACRYLATES HAVING 8 TO 20 CARBON ATOMS IN THE ALKYL GROUP AND AMINOALKYL ACRYLATES HAVING UP TO 18 CARBON ATOMS IN THE AMINOALKYL GROUP, SAID COPOLYMER CONTAINING 5 TO 20 NITROGEN ATOMS PER MOLECULE, THE AMOUNT OF SULFONIC ACIDS RELATIVE TO THE POLYMER BEING IN THE RANGE FROM ONE PART BY WEIGHT OF SULFONIC ACIDS PER FIVE PARTS OF SAID COPOLYMER, TO AN AMOUNT SUFFICIENT TO NEUTRALIZE ALL THE AMINO GROUPS OF SAID COPOLYMER.
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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) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |