US3909215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rust inhibitors for hydrocarbon fuels
Assignee: Chevron USA Inc
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Filing: 1973-03-27
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Granted: 1975-09-30
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Expires: 1993-03-27
Abstract
Abstract A novel rust inhibitor mixture for use in hydrocarbon fuels comprising an Alpha -olefin-maleimide copolymer and a hydrocarbyl amine, amide or imidazoline is disclosed. A method of inhibiting rust in fuel oils is also disclosed.
Inventors
- 👤 Louis R Kray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:28
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/143; C10M; C10M1/00; C10M1/08; C10L1/18; C10L1/192; C10L1/198; C10L1/1985; C10L1/22; C10L1/222; C10L1/232; C10L1/234; C10L1/236; C10L1/2364; C10L1/238; C10L1/2383; C10L1/24; C10L1/2431; C10L1/2437; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/08; C10M2215/082; C10M2215/22; C10M2215/223; C10M2215/224; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/024; C10M2217/028; C10M2217/04; C10M2217/046; C10M2217/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
95 words
A composition of matter comprising in an admixture (1) a copolymer of an alpha-olefin having from 8 to 30 carbons and an N-substituted maleimide wherein the N-substituents are organic radicals having from 3 to 60 carbons and from 1 to 5 amine nitrogens, said copolymer having from 4 to 20 repeating olefin-maleimide units, and (2) a hydrocarbyl amine, having from 3 to 60 carbons and from 1 to 10 nitrogens, the ratio of said copolymer to said hydrocarbyl amine, being within the range of 10 to 0.75 parts of copolymer per part of hydrocarbyl amine.
Claim 2
Dependent Claim
95 words
A composition of matter comprising in an admixture (1) a copolymer of an alpha-olefin having from 8 to 30 carbons and an N-substituted maleimide wherein the N-substituents are organic radicals having from 3 to 60 carbons and from 1 to 5 amine nitrogens, said copolymer having from 4 to 20 repeating olefin-maleimide units, and (2) a hydrocarbyl amine, having from 3 to 60 carbons and from 1 to 10 nitrogens, the ratio of said copolymer to said hydrocarbyl amine, being within the range of 10 to 0.75 parts of copolymer per part of hydrocarbyl amine.
Claim 3
Dependent Claim
21 words
The composition defined in claim 1 wherein said copolymers have as the repeating group, a unit of the following general structure:
Claim 4
Dependent Claim
12 words
The composition defined in claim 2 wherein said hydrocarbyl amine, is N-(aminopropyl)oleylamine.
Claim 5
Dependent Claim
15 words
The composition defined in claim 2 wherein a demulsifier is also present within said admixture.
Claim 6
Dependent Claim
36 words
The composition defined in claim 4 wherein said demulsifier is selected from the group consisting of (1) an alkoxy-modified methylene-bridged-polyalkyl phenol, (2) an ammonia neutralized sulfonated alkyl phenol, (3) an oxyalKylated glycol, and (4) mixtures thereof.
Claim 7
Dependent Claim
15 words
The composition defined in claim 4 wherein said demulsifier has the following generalized structural formula:
Claim 8
Dependent Claim
107 words
A COMPOSITION OF MATTER COMPRISING IN AN ADMIXTURE (1) A MAJOR AMOUNT OF AN OLEOPHILIC ORGANIC LIQUID (2) FROM 25 TO 500 WEIGHT PARTS PER MILLION OF A COPOLYMER OF AN ALPHAOLEFIN HAVING FROM 8 TO 30 CARBON AND AN N-SUBSTITUTED MALEIMIDE WHEREIN THE N-SUBSTITUENTS ARE ORGANIC RADICALS HAVING FROM 3 TO 60 CARBONS AND FROM 1 TO 5 NITROGENS SAID COPOLYMER HAVING FROM 4 TO 20 REPEATING OLEFIN-MALIMIDE UNITS AND (3) FROM 10 TO 500 WEIGHT PARTS PER MILLION OF A HYDROCARBYL AMINE HAVING FROM 3 TO 60 CARBONS AND FROM 1 TO 10 NITROGENS WITH A CARBON TO NITROGEN ATOMIC RATIO FROM 5 TO 30:1
Claim 9
Dependent Claim
107 words
A COMPOSITION OF MATTER COMPRISING IN AN ADMIXTURE (1) A MAJOR AMOUNT OF AN OLEOPHILIC ORGANIC LIQUID (2) FROM 25 TO 500 WEIGHT PARTS PER MILLION OF A COPOLYMER OF AN ALPHAOLEFIN HAVING FROM 8 TO 30 CARBON AND AN N-SUBSTITUTED MALEIMIDE WHEREIN THE N-SUBSTITUENTS ARE ORGANIC RADICALS HAVING FROM 3 TO 60 CARBONS AND FROM 1 TO 5 NITROGENS SAID COPOLYMER HAVING FROM 4 TO 20 REPEATING OLEFIN-MALIMIDE UNITS AND (3) FROM 10 TO 500 WEIGHT PARTS PER MILLION OF A HYDROCARBYL AMINE HAVING FROM 3 TO 60 CARBONS AND FROM 1 TO 10 NITROGENS WITH A CARBON TO NITROGEN ATOMIC RATIO FROM 5 TO 30:1
Claim 10
Dependent Claim
15 words
The composition defined in claim 7 wherein said oleophilic liquid is a petroleum distillate fuel.
Claim 11
Dependent Claim
21 words
The composition defined in claim 8 wherein said copolymers have as the repeating group, a unit of the following general structure:
Claim 12
Dependent Claim
15 words
The composition defined in claim 9 wherein a demulsifier is also present within said admixture.
Claim 13
Dependent Claim
36 words
The composition defined in claim 10 wherein said demulsifier is selected from the group consisting of (1) an alkoxy-modified methylene-bridged-polyalkyl phenol, (2) an ammonia neutralized sulfonated alkyl phenol, (3) an oxyalkylated glycol, and (4) mixtures thereof.
Claim 14
Dependent Claim
15 words
The composition defined in claim 10 wherein said demulsifier has the following generalized structural formula:
Claim 15
Dependent Claim
12 words
The composition defined in claim 8 wherein said hydrocarbyl amine, is N-(aminopropyl)-oleylamine.
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |