US2560588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral oil containing polymers of esters of fumaric acid
Assignee: Standard Oil Development Co
•
Filing: 1945-12-29
•
Granted: 1951-07-17
•
Expires: 1965-12-29
Abstract
No abstract record available.
Inventors
- 👤 John C Munday
- 👤 Dilworth T Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:19
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/195; C10L1/197; C10L1/1976; C10M; C10M145/00; C10M145/02; C10M145/10; C10M145/16; C10M2207/00; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A COMPOSITION COMPRISING A MAJOR PROPORTION OF A WAXY MINERAL LUBRICATING OIL AND A MINOR BUT AT LEAST POUR POINT DEPRESSING AMOUNT OF A POLYMER OF FUMARATE ALKYL ESTER GROUP HAVING MORE THAN ONE DISTINCT ALKYL ESTER GROUP HAVING FROM 1 TO 18 CARBON ATOMS, AT LEAST ONE OF SAID ALKYL ESTER GROUPS HAVING A CHAIN LENGTH IN EXCESS OF 10 CARBON ATOMS AND ALL OF SAID ALKYL ESTER GROUPS HAVING AN AVERAGE OF BETWEEN 5 AND 15 CARBON ATOMS, SAID POLYMER HAVING A MOLECULAR WEIGHT WITHIN A RANGE OF FROM 1,000 TO 40,000 AND HAVING BEEN PREPARED BY FIRST FORMING THE FUMARATE ESTER AND THEN POLYMERIZING SAID ESTER IN THE ABSENCE OF AIR.
Claim 2
Dependent Claim
114 words
A COMPOSITION COMPRISING A MAJOR PROPORTION OF A WAXY MINERAL LUBRICATING OIL AND A MINOR BUT AT LEAST POUR POINT DEPRESSING AMOUNT OF A POLYMER OF FUMARATE ALKYL ESTER GROUP HAVING MORE THAN ONE DISTINCT ALKYL ESTER GROUP HAVING FROM 1 TO 18 CARBON ATOMS, AT LEAST ONE OF SAID ALKYL ESTER GROUPS HAVING A CHAIN LENGTH IN EXCESS OF 10 CARBON ATOMS AND ALL OF SAID ALKYL ESTER GROUPS HAVING AN AVERAGE OF BETWEEN 5 AND 15 CARBON ATOMS, SAID POLYMER HAVING A MOLECULAR WEIGHT WITHIN A RANGE OF FROM 1,000 TO 40,000 AND HAVING BEEN PREPARED BY FIRST FORMING THE FUMARATE ESTER AND THEN POLYMERIZING SAID ESTER IN THE ABSENCE OF AIR.
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) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |