US4564467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil composition
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1983-12-28
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Granted: 1986-01-14
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Expires: 2003-12-28
Abstract
Abstract This invention concerns an oil composition comprising a major proportion by weight of an oil having a kinematic viscosity of 5 to 30 cSt at 40 DEG C. e.g. a transformer oil, and a minor proportion by weight of an organo siloxane having the formula: <IMAGE> wherein R1 is independently methyl, ethyl or propyl, R2 is independently a C10 to C20 alkyl group and n is 12 to 28. Such oil compositions having low pour points and excellent dielectric properties can be used as electrical oils.
Inventors
- 👤 Alain J. Rauline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:32
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M101/00; C10M101/02; C10M139/00; C10M139/04; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; H01B3/465; C10M2203/00; C10M2203/10; C10M2203/1006; C10M2203/102; C10M2203/1025; C10M2203/104; C10M2203/1045; C10M2203/106; C10M2203/1065; C10M2203/108; C10M2203/1085; C10M2227/00; C10M2227/04; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
79 words
An electrical oil composition having suitable dielectric properties comprising a major proportion by weight of an oil having a kinematic viscosity of 5 to 30 cSt at 40° C. and a pour point depressing amount in the range of 0.01 to 10.0 weight percent of an organo siloxane having the formula: ##STR6## wherein R 1 is independently methyl, ethyl or propyl, R 2 is independently a C 10 to C 20 alkyl group and n is 12 to 28.
Claim 2
Dependent Claim
79 words
An electrical oil composition having suitable dielectric properties comprising a major proportion by weight of an oil having a kinematic viscosity of 5 to 30 cSt at 40° C. and a pour point depressing amount in the range of 0.01 to 10.0 weight percent of an organo siloxane having the formula: ##STR6## wherein R 1 is independently methyl, ethyl or propyl, R 2 is independently a C 10 to C 20 alkyl group and n is 12 to 28.
Claim 3
Dependent Claim
16 words
A composition according to claim 1 wherein the oil is a mineral oil of electrical grade.
Claim 4
Dependent Claim
18 words
A composition according to claim 2 wherein the oil is 90 Neutral base oil or transformer oil 60N.
Claim 5
Dependent Claim
22 words
A composition according to claim 1 wherein the kinematic viscosity of the oil at 40° C. is between 5 and 20 cSt.
Claim 6
Dependent Claim
81 words
An electrical oil composition having suitable dielectric properties comprising a major proportion by weight of an oil having a kinematic viscosity of 5 to 30 cSt at 40° C. and a pour depressing amount in the range of 0.01 to 10.0 weight percent of an organo siloxane having the formula: ##STR7## wherein R 1 is independently methyl, ethyl or propyl, R 2 is independently a C 14 , C 15 or C 16 alkyl group and n is 12 to 28.
Claim 7
Dependent Claim
81 words
An electrical oil composition having suitable dielectric properties comprising a major proportion by weight of an oil having a kinematic viscosity of 5 to 30 cSt at 40° C. and a pour depressing amount in the range of 0.01 to 10.0 weight percent of an organo siloxane having the formula: ##STR7## wherein R 1 is independently methyl, ethyl or propyl, R 2 is independently a C 14 , C 15 or C 16 alkyl group and n is 12 to 28.
Claim 8
Dependent Claim
16 words
A composition according to claim 5 wherein the oil is a mineral oil of electrical grade.
Claim 9
Dependent Claim
18 words
A composition according to claim 6 wherein the oil is 90 Neutral base oil or transformer oil 60N.
Claim 10
Dependent Claim
22 words
A composition according to claim 5 wherein the kinematic viscosity of the oil at 40° C. is between 5 and 20 cSt.
Claim 11
Dependent Claim
78 words
An electrical oil composition having suitable dielectric properties comprising a major proportion by weight of an oil having a kinematic viscosity of 5 to 30 cSt at 40° C. and a pour depressing amount in the range of 0.01 to 10.0 weight percent of an organo siloxane having the formula: ##STR8## wherein R 1 is independently methyl, ethyl or propyl, R 2 is independently a C 10 to C 20 alkyl group and n is 16 to 20.
Claim 12
Dependent Claim
78 words
An electrical oil composition having suitable dielectric properties comprising a major proportion by weight of an oil having a kinematic viscosity of 5 to 30 cSt at 40° C. and a pour depressing amount in the range of 0.01 to 10.0 weight percent of an organo siloxane having the formula: ##STR8## wherein R 1 is independently methyl, ethyl or propyl, R 2 is independently a C 10 to C 20 alkyl group and n is 16 to 20.
Claim 13
Dependent Claim
22 words
A composition according to claim 9 wherein the kinematic viscosity of the oil at 40° C. is between 5 and 20 cSt.
Claim 14
Dependent Claim
14 words
A composition according to claim 9 wherein the organo siloxane has the formula: ##STR9##
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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) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |