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Patent US5296560A successfully refreshed from Google Patents.
US5296560A
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Ashless dispersants
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1993-08-06
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Granted: 1994-03-22
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Expires: 2013-08-06
Abstract
Abstract According to the present invention, improved dispersants are provided which comprise adducts of (A) polymer-substituted mono- and dicarboxylic acid or anhydrides and (B) bis(para-amino cyclohexyl) methane oligomers, wherein the reactants are contacted in a reaction zone in the substantial absence of polar organic solvents.
Inventors
- 👤 Antonio Gutierrez
- 👤 Robert D. Lundberg
- 👤 Robert A. Kleist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:34
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/221; C10L1/234; C10L1/238; C10M133/00; C10M133/52; C10M2205/00; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/129; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/044; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/067; C10M2215/068; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/046; C10M2221/00; C10M2221/04; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2227/00; C10M2227/06; C10M2227/061; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/02; C10N2040/06; C10N2040/08; C10N2040/25; C10N2040/251; C10N2040/252; C10N2040/253; C10N2040/255; C10N2040/28; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
54 words
Dispersant adduct useful in lubricating oils comprising reaction products of (A) polymer-substituted mono- or dicarboxylic acid or anhydrides derived from the reaction of (i) polyolefin with (ii) monounsaturated carboxylic reactant and (B) bis (para-amino cyclohexyl) methane oligomers; said reaction being conducted in a manner and under conditions sufficient to formimide, amide or mixtures thereof.
Claim 2
Dependent Claim
54 words
Dispersant adduct useful in lubricating oils comprising reaction products of (A) polymer-substituted mono- or dicarboxylic acid or anhydrides derived from the reaction of (i) polyolefin with (ii) monounsaturated carboxylic reactant and (B) bis (para-amino cyclohexyl) methane oligomers; said reaction being conducted in a manner and under conditions sufficient to formimide, amide or mixtures thereof.
Claim 3
Dependent Claim
12 words
The dispersant adduct according to claim 1 wherein the polymer comprises polybutylene.
Claim 4
Dependent Claim
12 words
The dispersant adduct according to claim 2 wherein the polymer comprises polyisobutylene.
Claim 5
Dependent Claim
18 words
The dispersant adduct according to claim 1 wherein the reactant (A) comprises a polymer-substituted succinic acid or anhydride.
Claim 6
Dependent Claim
33 words
The dispersant adduct according to claim 4 wherein reactant (A) is derived by the reaction of maleic anhydride and a polybutylene having a number average molecular weight of from about 1,300 to 3,000.
Claim 7
Dependent Claim
21 words
The dispersant adduct according to claim 1 wherein the reactant (B) contains from about 8 to 16 wt. % total N.
Claim 8
Dependent Claim
22 words
The dispersant adduct according to claim 1 wherein the dispersant adduct contains at least one primary or secondary amino group per molecule.
Claim 9
Dependent Claim
23 words
The dispersant adduct according to claim 7 wherein the dispersant adduct contains from 1 to 15 primary or secondary amine groups per molecule.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-03-21 | 1997-09-20 | 1998-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-21 | 2001-09-20 | 2002-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-21 | 2005-09-20 | 2006-03-22 | $7700.00 | Window Closed / Lapsed |