US3674696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gaseous dielectric materials
Assignee: AT&T Inc
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Filing: 1970-12-30
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Granted: 1972-07-04
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Expires: 1990-12-30
Abstract
Abstract Materials are described which are useful as gaseous dielectric insulators in electrical devices. These materials are a group of sulfur compounds which have two fluorine atoms and at least one perfluoroalkylimino group attached to the sulfur atom. It has been discovered that the substitution of a perfluoroalkylimino group for an oxygen atom attached to a sulfur atom increases the dielectric breakdown voltage of the molecule. These gaseous materials can be used both in substantially pure form or mixed with inert gaseous material. They exhibit high breakdown voltages and in addition do not yield undesirable reaction products when exposed to dielectric breakdown.
Inventors
- 👤 James Edward Griffiths
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:44
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
30 words
The electrical apparatus of claim 1 in which the interstices contain from 0-90 percent of a gas selected from a group consisting of nitrogen, helium, air, carbon dioxide and hydrogen.
Claim 2
Dependent Claim
16 words
The electrical apparatus of claim 1 in which the first and second portions are physically separated.
Claim 3
Dependent Claim
17 words
The apparatus of claim 3 in which the said first and second portions comprise an electric generator.
Claim 4
Dependent Claim
17 words
The electrical apparatus of claim 3 in which said first and second portions comprise an electric transformer.
Claim 5
Dependent Claim
18 words
The electrical apparatus of claim 3 in which the said first and second portions comprise an electric condenser.
Claim 6
Dependent Claim
18 words
The electrical apparatus of claim 3 in which the said first and second portions comprise an electrical switch.
Claim 7
Dependent Claim
18 words
The electrical apparatus of claim 1 in which the first and second portions are in D.C. electrical contact.
Claim 8
Dependent Claim
17 words
The electrical apparatus of claim 8 in which the said first and second portions comprise a waveguide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |