US4652386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil preparations
Assignee: Bayer AG
•
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 13:34
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.
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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 |