US4527996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deposit control additives - hydroxy polyether polyamines
Assignee: Chevron USA Inc
•
Filing: 1984-12-28
•
Granted: 1985-07-09
•
Expires: 2004-12-28
Abstract
Abstract Additives for the control of deposits in the intake systems of engines are provided. The additives comprise hydroxy polyether amines of the general formula: ##STR1## Also provided are a fuel composition containing from about 250 ppm to 5000 ppm of this additive and a concentrate containing this additive.
Inventors
- 👤 Curtis B. Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:04
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/2225; C10M; C10M133/00; C10M133/02; C10M133/04; C10M133/06; C10M133/08; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A fuel-soluble additive for engine deposit control having the formula: ##STR5## wherein R i and R ii independently are selected from the group consisting of hydrogen and alkyl groups having from 1 to 4 carbon atoms, and where at least one of R i and R ii has at least 2 carbon atoms; R iii and R iv independently are hydrogen or methyl; R v and R vi independently are hydrogen or ##STR6## where Z is an integer from 1 to 5 with the proviso that R v and R vi both are not hydrogen; and x and y independently are integers from 1 to 30.
Claim 2
Dependent Claim
106 words
A fuel-soluble additive for engine deposit control having the formula: ##STR5## wherein R i and R ii independently are selected from the group consisting of hydrogen and alkyl groups having from 1 to 4 carbon atoms, and where at least one of R i and R ii has at least 2 carbon atoms; R iii and R iv independently are hydrogen or methyl; R v and R vi independently are hydrogen or ##STR6## where Z is an integer from 1 to 5 with the proviso that R v and R vi both are not hydrogen; and x and y independently are integers from 1 to 30.
Claim 3
Dependent Claim
23 words
A deposit control additive as claimed in claim 1, wherein said additive has a molecular weight of from about 500 to about 2000.
Claim 4
Dependent Claim
20 words
A deposit control additive as claimed in claim 2, wherein said molecular weight is from about 700 to about 1200.
Claim 5
Dependent Claim
33 words
A concentrate comprising an inert stable olephilic organic solvent boiling in the range of 150° to 400° F. and from about 0.3 to about 50 weight percent of the compound of claim 1.
Claim 6
Dependent Claim
119 words
A fuel composition comprising a hydrocarbon fuel boiling in the gasoline range, and from about 250 parts per million by weight to about 5000 parts per million by weight of a fuel-soluble additive having the formula: ##STR7## wherein R i and R ii independently are selected from the group consisting of hydrogen and alkyl groups having from 1 to 4 carbon atoms, and where at least one of R i and R ii has at least 2 carbon atoms; R iii and R iv independently are hydrogen or methyl's R v and R vi independently are hydrogen or ##STR8## where Z is an integer from 1 to 5; and x and y independently are integers from 1 to 30.
Claim 7
Dependent Claim
119 words
A fuel composition comprising a hydrocarbon fuel boiling in the gasoline range, and from about 250 parts per million by weight to about 5000 parts per million by weight of a fuel-soluble additive having the formula: ##STR7## wherein R i and R ii independently are selected from the group consisting of hydrogen and alkyl groups having from 1 to 4 carbon atoms, and where at least one of R i and R ii has at least 2 carbon atoms; R iii and R iv independently are hydrogen or methyl's R v and R vi independently are hydrogen or ##STR8## where Z is an integer from 1 to 5; and x and y independently are integers from 1 to 30.
Claim 8
Dependent Claim
24 words
A fuel composition as claimed in claim 5 wherein said concentration is from about 300 ppm by weight to about 2000 ppm by weight.
References Cited (Backward Citations)
US2522155A
Cited
US3231619A
Cited
US3440029A
Cited
US3456013A
Cited
GB1484341A
Cited
US4247301A
Cited
US4261704A
Cited
US4332595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-08 | 1989-01-07 | 1989-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-08 | 1993-01-07 | 1993-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-08 | 1997-01-07 | 1997-07-09 | $7700.00 | Window Closed / Lapsed |