US3864099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral oils containing copolymers of aziridineethyl acrylates and methacrylates: alkyl acrylates and methacrylates
Assignee: Gulf Research and Development Co
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Filing: 1973-12-03
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Granted: 1975-02-04
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Expires: 1993-12-03
Abstract
Abstract Crude oils having high pour points, mineral lubricating oils and fuel oils are improved in one or more of their characteristics such as their dispersancy, pour point, viscosity and viscosity index characteristics by the addition of a copolymer of (a) a monomeric aziridineethyl acrylate or methacrylate and (b) a monomeric alkyl ester of acrylic or methacrylic acid whose alkyl substituent contains 8 to 18 carbon atoms, said copolymer having a molecular weight of at least about 20,000 and a mole ratio of (a):(b) within the range of about 1:2 to about 1:99, respectively, e.g., aziridineethyl methacrylate:lauryl methacrylate (1:19).
Inventors
- 👤 Arvid Ek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:22
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/234; C10L1/236; C10L1/2368; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/062; C10M; C10M1/00; C10M1/08; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/06; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
22 words
The oil composition of claim 1 wherein said small amount is about 0.001 to about 10 percent by weight of the composition.
Claim 2
Dependent Claim
54 words
A distillate fuel oil composition which comprises a major amount of a petroleum distillate boiling in the range of about 300* F. (148.9* C.) to about 750* F. (398.9* C.) and about 0.001 to about 5 percent by weight of a copolymer of (a) a monomeric aziridinyl ethyl carboxylic acid ester having the formula
Claim 3
Dependent Claim
22 words
The distillate fuel oil composition of claim 3 wherein constituent monomer (a) is aziridineethyl methacrylate and constituent monomer (b) is lauryl methacrylate.
Claim 4
Dependent Claim
16 words
The distillate fuel oil composition of claim 4 wherein the mole ratio of (a):(b) is 1:9.
Claim 5
Dependent Claim
16 words
The distillate fuel oil composition of claim 4 wherein the mole ratio of (a):(b) is 1:19.
Claim 6
Dependent Claim
38 words
A lubricating oil composition which comprises a major amount of a mineral lubricating oil and about 0.5 to about 10 percent by weight of a copolymer of (a) a monomeric aziridinyl ethyl carboxylic acid ester having the formula
Claim 7
Dependent Claim
21 words
The lubricating oil composition of claim 7 wherein constituent monomer (a) is aziridineethyl methacrylate and constituent monomer (b) is lauryl methacrylate.
Claim 8
Dependent Claim
15 words
The lubricating oil composition of claim 8 wherein the mole ratio of (a):(b) is 1:4.
Claim 9
Dependent Claim
15 words
The lubricating oil composition of claim 8 wherein the mole ratio of (a):(b) is 1:9.
Claim 10
Dependent Claim
15 words
The lubricating oil composition of claim 8 wherein the mole ratio of (a):(b) is 1:12.
Claim 11
Dependent Claim
15 words
The lubricating oil composition of claim 8 wherein the mole ratio of (a):(b) is 1:19.
Claim 12
Dependent Claim
38 words
A crude oil composition which comprises a major amount of a mineral crude oil and about 0.001 to about 5 percent by weight of a copolymer of (a) a monomeric aziridinyl ethyl carboxylic acid ester having the formula
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 |