Patent US3864368A successfully refreshed from Google Patents.
US3864368A
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Polyamide of a Mixture of Secondary and Tertiary Monocarboxylic Acids
Assignee: Gulf Research and Development Co
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Filing: 1973-06-05
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Granted: 1975-02-04
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Expires: 1993-06-05
Abstract
Abstract A novel polyamide capable of improving the pour point, dispersancy and detergency characteristics of a lubricating oil comprises a polyamide of a mixture of secondary and tertiary monocarboxylic acids having 19 to 31 carbon atoms in the molecule and a polyalkylene polyamine containing about 2 to about 6 alkylene units, there being from 2 to 4 carbon atoms in each alkylene group, said polyamide containing about 1 to about 3 amine groups in addition to amide groups.
Inventors
- 👤 Robert J Hartle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:22
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/10; C07C51/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
51 words
A POLYAMIDE OF A MIXTURE OF SECONDARY AND TERTIARY MONOCARBOXYLIC ACIDS AND A POLYALKYLENE POLYAMINE CONTAINING ABOUT 2 TO ABOUT 6 ALKYLENE UNITS, THERE BEING FROM 2 TO 4 CARBON ATOMS IN EACH ALKYLENE GROUP, SAD MIXTURE OF SECONDARY AND TERTIARY MONOCARBOXYLIC ACIDS FALLING WITHIN EACH OF THE FOLLOWING GENERAL STRUCTURES
Claim 2
Dependent Claim
51 words
A POLYAMIDE OF A MIXTURE OF SECONDARY AND TERTIARY MONOCARBOXYLIC ACIDS AND A POLYALKYLENE POLYAMINE CONTAINING ABOUT 2 TO ABOUT 6 ALKYLENE UNITS, THERE BEING FROM 2 TO 4 CARBON ATOMS IN EACH ALKYLENE GROUP, SAD MIXTURE OF SECONDARY AND TERTIARY MONOCARBOXYLIC ACIDS FALLING WITHIN EACH OF THE FOLLOWING GENERAL STRUCTURES
Claim 3
Dependent Claim
23 words
A polyamide according to claim 1 wherein approximately half of the monocarboxylic acids in the mixture are secondary and approximately half are tertiary.
Claim 4
Dependent Claim
12 words
A polyamide according to claim 1 wherein said polyalkylene polyamine is tetraethylenepentamine.
Claim 5
Dependent Claim
15 words
A polyamide according to claim 3 wherein x is a number from 18 to 24.
Claim 6
Dependent Claim
23 words
A polyamide according to claim 4 wherein approximately half of the monocarboxylic acids in the mixture are secondary and approximately half are tertiary.
Claim 7
Dependent Claim
10 words
A polyamide according to claim 3 wherein x is 18.
Claim 8
Dependent Claim
23 words
A polyamide according to claim 6 wherein approximately half of the monocarboxylic acids in the mixture are secondary and approximately half are tertiary.
Claim 9
Dependent Claim
10 words
A polyamide according to claim 3 wherein x is 20.
Claim 10
Dependent Claim
23 words
A polyamide according to claim 8 wherein approximately half of the monocarboxylic acids in the mixture are secondary and approximately half are tertiary.
Claim 11
Dependent Claim
18 words
A polyamide according to claim 3 wherein x is a mixture of even numbers from 18 to 24.
Claim 12
Dependent Claim
23 words
A polyamide according to claim 10 wherein approximately half of the monocarboxylic acids in the mixture are secondary and approximately half are tertiary.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |