Patent US3687905A successfully refreshed from Google Patents.
US3687905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction product of carboxylic acid with degraded ethylene-propylene interpolymer
Assignee: Lubrizol Corp
•
Filing: 1970-03-16
•
Granted: 1972-08-29
•
Expires: 1990-03-16
Abstract
Abstract An oxidized, degraded interpolymer of ethylene and propylene is reacted with an unsaturated acid or derivative thereof, preferably maleic acid or anhydride, to form an acidic intermediate. This acidic intermediate is reacted with a polyamine to form a product which is useful as an additive in fuels, lubricant compositions and hydrocarbon oils.
Inventors
- 👤 Casper J Dorer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:40
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32; Y; Y10; Y10S; Y10S526/00; Y10S526/914
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
26 words
A carboxylic and or derivative thereof according to claim 1 prepared by reacting said oxidized, degraded interpolymer with about 1-20 percent by weight of maleic anhydride
Claim 2
Dependent Claim
33 words
A method for the preparation of a hydrocarbon oil-soluble nitrogen-containing composition of matter which comprises reacting the composition of claim 1 with a polyamine having at least one primary or secondary amino group.
Claim 3
Dependent Claim
39 words
A method according to claim 3 which comprises first preparing a carboxylic acid derivative by reacting said oxidized, degraded interpolymer with about 1-20 percent by weight of maleic anhydride, and subsequently reacting said carboxylic acid derivative with said polyamine.
Claim 4
Dependent Claim
16 words
A method according to claim 4 wherein the interpolymer is a copolymer of ethylene and propylene.
Claim 5
Dependent Claim
19 words
A method according to claim 4 wherein the interpolymer is a terpolymer of ethylene, propylene and a polymerizable diene.
Claim 6
Dependent Claim
13 words
A method according to claim 6 wherein the diene is a non-conjugated diene.
Claim 7
Dependent Claim
29 words
A method according to claim 7 wherein the interpolymer contains about 20-70 mole percent propylene units, about 30-80 mole percent ethylene units and about 1-10 mole percent diene units.
Claim 8
Dependent Claim
13 words
A hydrocarbon oil-soluble composition of matter prepared by the process of claim 3.
Claim 9
Dependent Claim
13 words
A hydrocarbon oil-soluble composition of matter prepared by the process of claim 4.
Claim 10
Dependent Claim
13 words
A hydrocarbon oil-soluble composition of matter prepared by the process of claim 7.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |