Patent US5143640A successfully refreshed from Google Patents.
US5143640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyether lubricants
Assignee: Cognis Speciality Organics Far East Ltd
•
Filing: 1991-06-21
•
Granted: 1992-09-01
•
Expires: 2011-06-21
Abstract
Abstract An industrial or automobile lubricating oil, for use e.g. as automotive or industrial gear lubricants, two-stroke engine lubricants, comprises (a) 0 to 40% by weight of mineral oil(s) and (b) 100 to 60% by weight of a polyether having the general formula RX[CxH2xO)n(CyH2yO)pH[m wherein R is C9 to C30 alkyl or alkylphenyl, X is O, S or N, x is 2 to 4, y is 6 to 30, m is 1 or 2 and n and p are such that the polyether contains between 1 and 35% by weight of (CyH2yO) units and between 35 and 80% by weight of (CxH2xO) units. The polyether preferably has a molecular weight in the range 600 to 4000 and a viscosity in the range 32-460 mPa.s at 40 DEG C.
Inventors
- 👤 John R. Moxey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:57
CPC Classifications
C; C10; C10M; C10M107/00; C10M107/20; C10M107/30; C10M107/32; C10M107/34; C10M101/00; C10M101/02; C10M111/00; C10M111/04; C10M2203/00; C10M2203/10; C10M2203/1006; C10M2203/102; C10M2203/1025; C10M2203/104; C10M2203/1045; C10M2203/106; C10M2203/1065; C10M2203/108; C10M2203/1085; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/1033; C10M2209/104; C10M2209/1045; C10M2209/105; C10M2209/1055; C10M2209/106; C10M2209/1065; C10M2209/107; C10M2209/1075; C10M2209/108; C10M2209/1085; C10M2209/109; C10M2209/1095; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2221/00; C10M2221/04; C10M2221/043; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/02; C10N2040/08; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/26; C10N2040/28
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
An industrial or automotive lubricating oil composition consisting essentially of (a) one or more mineral oils and (b) more than 60% by weight of a polyether having the general formula RX[(C.sub.3 H.sub.6 O).sub.n (C.sub.y H.sub.2y O).sub.p H].sub.m wherein R is either an alkyl or alkylphenyl group having from 9 to 30 carbon atoms X is selected from O, S or N y is 6 to 30 m is 1 or 2 n and p are integers such that the polyether contains between 1 and 35% by weight of (C y H 2y O) units and between 35 and 80% by weight of (C 3 H 6 O) units.
Claim 2
Dependent Claim
108 words
An industrial or automotive lubricating oil composition consisting essentially of (a) one or more mineral oils and (b) more than 60% by weight of a polyether having the general formula RX[(C.sub.3 H.sub.6 O).sub.n (C.sub.y H.sub.2y O).sub.p H].sub.m wherein R is either an alkyl or alkylphenyl group having from 9 to 30 carbon atoms X is selected from O, S or N y is 6 to 30 m is 1 or 2 n and p are integers such that the polyether contains between 1 and 35% by weight of (C y H 2y O) units and between 35 and 80% by weight of (C 3 H 6 O) units.
Claim 3
Dependent Claim
44 words
An industrial or automotive lubricating oil as claimed in claim 1 characterised in that the polyether contains between 9 and 25% by weight of (C y H 2y O) units and between 50 and 80% by weight of (C 3 H 6 O) units.
Claim 4
Dependent Claim
19 words
An industrial or automotive lubricating oil as claimed in claim 2 characterised in that y is 12 to 16.
Claim 5
Dependent Claim
38 words
An industrial or automotive lubricating oil as claimed in claim 3 characterised in that R is selected from either alkyl groups having from 12 to 18 carbon atoms or alkylphenyl groups having from 9 to 24 carbon atoms.
Claim 6
Dependent Claim
42 words
An industrial or automotive lubricating oil as claimed in claim 1 characterised in that the molecular weight of the polyether is in the range 400 to 4000 and the viscosity of the polyether is in the range 32-460 mPa.s at 40° C.
Claim 7
Dependent Claim
39 words
An industrial or automotive lubricating oil as claimed in claim 1 wherein the polyether units (C y H 2y O) and (C y H 2y O) p , respectively are made up of one or more different alkylene oxides.
Claim 8
Dependent Claim
42 words
An industrial or automotive lubricating oil as claimed in claim 1 characterised in that, in the polyether, R is an alkyl or alkylphenyl group having from 10 to 30 carbon atoms, n is 5 to 30 and p is 1 to 4.
Claim 9
Dependent Claim
34 words
A process for preparing an industrial or automotive lubricating oil as defined in claim 1 characterised by blending mineral oils with more than 60% by weight of a polyether as defined in claim 1.
Claim 10
Dependent Claim
31 words
A process for lubricating the moving parts of industrial gears or of automobiles characterised by applying an industrial or automotive lubricating oil as defined in claim 1 to the moving parts.
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) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |