Patent US2615844A successfully refreshed from Google Patents.
US2615844A
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Mineral oil compositions containing esters of thiophene-modified copolymers of maleic anhydride with aliphatic vinyl compounds
Assignee: ExxonMobil Oil Corp
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Filing: 1949-11-14
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Granted: 1952-10-28
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Expires: 1969-11-14
Abstract
No abstract record available.
Inventors
- 👤 John J Giammaria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:34
CPC Classifications
C; C10; C10M; C10M145/00; C10M145/02; C10M145/10; C10M2221/00; C10M2221/02; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A MINERAL LUBRICATING OIL CONTAINING A MINOR PROPORTION, SUFFICIENT TO IMPROVE THE VISCOSITY INDEX THEREOF, OF THE PRODUCT OBTAINED BY (1) COPOLYMERIZING 1 MOLE OF MALEIC ANHYDRIDE WITH ABOUT 1 MOLE OF AN ALIPHATIC VINYL COMPOUND IN THE PRESENCE OF FROM ABOUT 0.25 MOLE TO ABOUT 6 MOLES OF A THIOPHENE COMPOUND SELECTED FROM THE GROUP CONSISTING OF THIOPHENES AND ALKYL THIOPHENES, TO FORM A THIOPHENE-MODIFIED COPOLYMER PRODUCT AND (2) REACTING THE COPOLYMER PRODUCT WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) PRIMARY, NORMAL, SATURATED, ALIPHATIC ALCOHOLS HAVING FROM ABOUT 12 TO ABOUT 18 CARBON ATOMS, (B) PRIMARY AND SECONDARY, SATURATED, ALIPHATIC AMINES HAVING FROM ABOUT 12 TO ABOUT 18 CARBON ATOMS AND (C) A MIXTURE OF PRIMARY, SATURATED, ALIPHATIC AMINES CONTAINING FROM 8 TO 18 CARBON ATOMS AND HAVING AN AVERAGE OF ABOUT 12 CARBON ATOMS PER MOLECULE.
Claim 2
Dependent Claim
141 words
A MINERAL LUBRICATING OIL CONTAINING A MINOR PROPORTION, SUFFICIENT TO IMPROVE THE VISCOSITY INDEX THEREOF, OF THE PRODUCT OBTAINED BY (1) COPOLYMERIZING 1 MOLE OF MALEIC ANHYDRIDE WITH ABOUT 1 MOLE OF AN ALIPHATIC VINYL COMPOUND IN THE PRESENCE OF FROM ABOUT 0.25 MOLE TO ABOUT 6 MOLES OF A THIOPHENE COMPOUND SELECTED FROM THE GROUP CONSISTING OF THIOPHENES AND ALKYL THIOPHENES, TO FORM A THIOPHENE-MODIFIED COPOLYMER PRODUCT AND (2) REACTING THE COPOLYMER PRODUCT WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) PRIMARY, NORMAL, SATURATED, ALIPHATIC ALCOHOLS HAVING FROM ABOUT 12 TO ABOUT 18 CARBON ATOMS, (B) PRIMARY AND SECONDARY, SATURATED, ALIPHATIC AMINES HAVING FROM ABOUT 12 TO ABOUT 18 CARBON ATOMS AND (C) A MIXTURE OF PRIMARY, SATURATED, ALIPHATIC AMINES CONTAINING FROM 8 TO 18 CARBON ATOMS AND HAVING AN AVERAGE OF ABOUT 12 CARBON ATOMS PER MOLECULE.
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) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |