Patent US4652386A successfully refreshed from Google Patents.
US4652386A
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Lubricating oil preparations
Assignee: Bayer AG
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Filing: 1985-09-13
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Granted: 1987-03-24
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Expires: 2005-09-13
Abstract
Abstract Organopolysiloxanes of the formula ##STR1## in which R is an alkyl radical having 6 to 18 C atoms, R' is an alkyl radical having 1 to 7 C atoms or the phenyl radical, a and b each independently is an integer from 1 to 500, the ratio of b:a being at least 2, are miscible with mineral oil and synthetic lubricating oils and have a pour point below -15° C.
Inventors
- 👤 Heinrich Alberts
- 👤 Siegfried Kussi
- 👤 Wolfgang Grape
- 👤 Ottfried Schlak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:27
CPC Classifications
C; C10; C10M; C10M111/00; C10M111/04; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C10M155/00; C10M155/02; C10M2229/00; C10M2229/02; C10M2229/025; C10M2229/04; C10M2229/0405; C10M2229/041; C10M2229/0415; C10M2229/042; C10M2229/0425; C10M2229/043; C10M2229/0435; C10M2229/044; C10M2229/0445; C10M2229/045; C10M2229/0455; C10M2229/046; C10M2229/0465; C10M2229/047; C10M2229/0475; C10M2229/048; C10M2229/0485; C10M2229/05; C10M2229/0505; C10M2229/051; C10M2229/0515; C10M2229/052; C10M2229/0525; C10M2229/053; C10M2229/0535; C10M2229/054; C10M2229/0545; C10N; C10N2020/00; C10N2020/01
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
An organopolysiloxane miscible with mineral oil, having a pour point below -15° C. and the formula ##STR13## in which R is an alkyl radical having 6 to 18 C atoms, R' is a methyl radical or a phenyl radical, a denotes 1 to 225 and b denotes 9 to 450, the ratio of b:a being at least 2.
Claim 2
Dependent Claim
58 words
An organopolysiloxane miscible with mineral oil, having a pour point below -15° C. and the formula ##STR13## in which R is an alkyl radical having 6 to 18 C atoms, R' is a methyl radical or a phenyl radical, a denotes 1 to 225 and b denotes 9 to 450, the ratio of b:a being at least 2.
Claim 3
Dependent Claim
20 words
A lubricating composition comprising a solution of a synthetic and/or mineral lubricating oil and an organopolysiloxane according to claim 1.
Claim 4
Dependent Claim
21 words
A composition according to claim 2, by weight comprising 0.1-75% of organopolysiloxane and 25-99% of synthetic and/or mineral oil lubricating oil.
References Cited (Backward Citations)
US2410346A
Cited
US3096303A
Cited
DE1276269B
Cited
FR1452303A
Cited
FR1461931A
Cited
DE1806445A1
Cited
US3664985A
Cited
US3816313A
Cited
US4008346A
Cited
US4059534A
Cited
US4275101A
Cited
US4230632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |