| (19) |
 |
|
(11) |
EP 0 731 159 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
21.05.1997 Bulletin 1997/21 |
| (43) |
Date of publication A2: |
|
11.09.1996 Bulletin 1996/37 |
| (22) |
Date of filing: 07.03.1996 |
|
| (51) |
International Patent Classification (IPC)6: C10M 159/20, C10M 159/22, C10M 159/24, C10L 1/18, C10L 1/24
// (C10M159/20, 159:20, 159:22, 159:22, 159:24, 159:24), C10N10:02, C10N10:04, C10N30:04,
C10N40:25 |
|
| (84) |
Designated Contracting States: |
|
BE FR GB |
| (30) |
Priority: |
07.03.1995 US 399783
07.03.1995 US 400156
|
| (71) |
Applicant: ETHYL CORPORATION |
|
Richmond,
Virginia 23219-4304 (US) |
|
| (72) |
Inventors: |
|
- Loop, John G.
Richmond,
Virginia 23235 (US)
- Watson, Elizabeth D.
Richmond,
Virginia 23220 (US)
- Valcho, Joseph J.
Richmond,
Virginia 23233 (US)
- Perozzi, Edmund F.
Glen Allen,
Virginia 23060 (US)
- Passut, Charles A.
Midlothian,
Virginia 23113 (US)
|
| (74) |
Representative: Cresswell, Thomas Anthony |
|
J.A. KEMP & CO.
14 South Square
Gray's Inn
London WC1R 5LX
London WC1R 5LX (GB) |
|
| |
|
| (54) |
Overbased lithium salt lubricant additives and production thereof |
(57) A lubricant additive concentrate which comprises a base oil of lubricating viscosity
and:
(a) at least one non-lithium oil-soluble overbased alkali or alkaline earth metal-containing
overbased detergent; and
(b) at least one oil-soluble overbased lithium salt detergent.