Patent US3877888A successfully refreshed from Google Patents.
US3877888A
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Middle distillate
Assignee: Universal Oil Products Co
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Filing: 1970-11-16
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Granted: 1975-04-15
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Expires: 1990-11-16
Abstract
Abstract Middle distillate of improved pour point containing a pour point depressant concentration of the amidization reaction product of N,N-dialkylamine having 16 to 18 carbon atoms in each alkyl and hydroxy-containing carboxylic acid having 2 to 22 carbon atoms.
Inventors
- 👤 Alexander Gaydasch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:15
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/19; C10L1/22; C10L1/222; C10L1/2222; C10L1/224
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
54 words
MIDDLE DISTILLATE OF IMPROVED POUR POINT CONTAINING IN COMBINATION THEREWITH A POUR DEPRESSANT CONCENTRATION OF THE AMIDIZATION REACTION PRODUCT OF N,N-DIALKYLAMINE HAVING 16 TO 18 CARBON ATOMS IN EACH ALKYL AND HYDROXYCONTAINING CARBOXYLIC ACID IN WICH HYDROXYL GROUP IS ATTACHED TO THE TERMINAL CARBON ATOM, SAID CARBOXYLIC ACID HAVING 2 TO 22 CARBON ATOMS.
Claim 2
Dependent Claim
54 words
MIDDLE DISTILLATE OF IMPROVED POUR POINT CONTAINING IN COMBINATION THEREWITH A POUR DEPRESSANT CONCENTRATION OF THE AMIDIZATION REACTION PRODUCT OF N,N-DIALKYLAMINE HAVING 16 TO 18 CARBON ATOMS IN EACH ALKYL AND HYDROXYCONTAINING CARBOXYLIC ACID IN WICH HYDROXYL GROUP IS ATTACHED TO THE TERMINAL CARBON ATOM, SAID CARBOXYLIC ACID HAVING 2 TO 22 CARBON ATOMS.
Claim 3
Dependent Claim
36 words
The middle distillate of claim 1 in which said reaction product is prepared by reacting at a temperature of from about 175*F. to about 450*F. for a time of from about 4 to about 50 hours.
Claim 4
Dependent Claim
12 words
The middle distillate of claim 1 in which said N,N-dialkylamine is N,N-ditallowamine.
Claim 5
Dependent Claim
13 words
The middle distillate of claim 1 in which said N,N-dialkylamine is hydrogenated N,N-ditallowamine.
Claim 6
Dependent Claim
13 words
The middle distillate of claim 4 in which the reaction product comprises N,N-ditallow-hydroxyacetamide.
Claim 7
Dependent Claim
13 words
The middle distillate of claim 4 in which the reaction product comprises N,N-ditallow-hydroxypropionamide.
Claim 8
Dependent Claim
13 words
The middle distillate of claim 4 in which the reaction product comprises N,N-ditallow-hydroxybutyramide.
Claim 9
Dependent Claim
13 words
The middle distillate of claim 4 in which the reaction product comprises N,N-ditallow-hydroxycaproamide.
Claim 10
Dependent Claim
13 words
The middle distillate of claim 4 in which the reaction product comprises N,N-ditallow-hydroxystearamide.
Claim 11
Dependent Claim
19 words
The middle distillate of claim 1 in which said concentration is from about 0.001% to about 1% by weight.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |