Patent US4166798A successfully refreshed from Google Patents.
US4166798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical device with fluorinated divalent sulfur dielectric gas
Assignee: Honeywell International Inc
•
Filing: 1978-08-21
•
Granted: 1979-09-04
•
Expires: 1998-08-21
Abstract
Abstract Electronegative, normally gaseous, fluorinated compounds with sulfur at valence state 2 act as good dielectric gases alone or in combination with sulfur hexafluoride. In particular bis (trifluoromethyl) sulfide has a higher dielectric strength than sulfur hexafluoride when used alone and increases dielectric strength of sulfur hexafluoride in blends.
Inventors
- 👤 Martin J. Mastroianni
- 👤 Sabatino R. Orfeo
- 👤 Bernard Sukornick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:22
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/56
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
In an improved high voltage electrical apparatus having at least two electrical conductors separated by an insulative dielectric gas subject to an electrical field, the improvement wherein the insulative dielectric gas comprises between about 0.5 and 100 mole % of a divalent sulfur compound selected from the group consisting of tetrafluororthiirane, hexafluorothietane, bis (trifluoromethyl) sulfide, perfluoromethyl ethyl thioether, perfluorodiethyl thioether, trifluoromethyl thiocyanate and mixtures thereof and 0 to about 99.5 mole % sulfur hexafluoride.
Claim 2
Dependent Claim
74 words
In an improved high voltage electrical apparatus having at least two electrical conductors separated by an insulative dielectric gas subject to an electrical field, the improvement wherein the insulative dielectric gas comprises between about 0.5 and 100 mole % of a divalent sulfur compound selected from the group consisting of tetrafluororthiirane, hexafluorothietane, bis (trifluoromethyl) sulfide, perfluoromethyl ethyl thioether, perfluorodiethyl thioether, trifluoromethyl thiocyanate and mixtures thereof and 0 to about 99.5 mole % sulfur hexafluoride.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1 wherein the insulative dielectric gas is subject to a substantially uniform electrical field.
Claim 4
Dependent Claim
17 words
The apparatus of claim 1 wherein the insulative dielectric gas is subject to a non-uniform electrical field.
Claim 5
Dependent Claim
31 words
The apparatus of claim 1 wherein the insulative dielectric gas comprises between about 0.5 and 100 mole % bis (trifluoromethyl) sulfide and between 0 and about 99.5 mole % sulfur hexafluoride.
Claim 6
Dependent Claim
22 words
The apparatus of claim 2 wherein the insulative dielectric gas comprises between about 40 and about 90 mole percent bis (trifluorormethyl) sulfide.
Claim 7
Dependent Claim
28 words
The apparatus of claim 1 wherein said divalent sulfur compound is a thioether selected from the group consisting of bis (trifluoromethyl) sulfide, perfluoromethyl ether thioether and perfluorodiethyl thioether.
Claim 8
Dependent Claim
20 words
The apparatus of claim 1 wherein the divalent sulfur compound is selected from the group consisting of tetrafluorothiirane and hexafluorothietane.
Claim 9
Dependent Claim
21 words
The apparatus of claim 1 wherein the insulative dielectric gas comprises between about 40 and about 90 mole percent bis(perfluoromethyl) sulfide.
Claim 10
Dependent Claim
60 words
A composition of matter comprising between about 10 and about 90 mole % sulfur hexafluoride and between about 10 and about 90 mole % of a divalent sulfur compound selected from the group consisting of tetrafluororthiirane, hexafluorothietane, bis (trifluoromethyl) sulfide, perfluoromethyl ethyl thioether, perfluorodiethyl thioether, trifluoromethyl thiocyanate and mixtures thereof and about 10 to about 90 mole % sulfur hexafluoride.
Claim 11
Dependent Claim
60 words
A composition of matter comprising between about 10 and about 90 mole % sulfur hexafluoride and between about 10 and about 90 mole % of a divalent sulfur compound selected from the group consisting of tetrafluororthiirane, hexafluorothietane, bis (trifluoromethyl) sulfide, perfluoromethyl ethyl thioether, perfluorodiethyl thioether, trifluoromethyl thiocyanate and mixtures thereof and about 10 to about 90 mole % sulfur hexafluoride.
Claim 12
Dependent Claim
14 words
The composition of claim 9 wherein said divalent sulfur compound is bis (perfluoromethyl) sulfide.
References Cited (Backward Citations)
US3059044A
Cited
US3136744A
Cited
US3390091A
Cited
US3674696A
Cited
US4071461A
Cited
US4052555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-03 | 1983-03-05 | 1983-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-03 | 1987-03-05 | 1987-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-03 | 1991-03-05 | 1991-09-04 | $7700.00 | Window Closed / Lapsed |