Patent US4251682A successfully refreshed from Google Patents.
US4251682A
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Operation of a lead-in-device receiving a conductor passed through the cover of an electrical precipitation apparatus
Assignee: Hoechst AG
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Filing: 1980-03-28
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Granted: 1981-02-17
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Expires: 2000-03-28
Abstract
Abstract The invention relates to a process for operating a lead-in-device receiving a conductor which passes through the cover of an electrical precipitation apparatus down to its electrode system. A portion of the conductor is encircled by an insulator which is radially spaced therefrom and of which the upper end provides support for a structural component having the conductor gas tightly passed therethrough. The space inside the insulator receives a sealing gas which is maintained under a pressure higher than that prevailing in the electrical precipitation apparatus. The sealing gas used for operating the device is a gas mixture consisting of an inert gas and at least 10 volume % of methane.
Inventors
- 👤 Hans Ebert
- 👤 Hans Kerber
- 👤 Robert Queck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:52
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/66; B03C3/70
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
102 words
A process for operating a lead-in-device receiving a conductor which passes through the cover of an electrical precipitation apparatus down to its electrode system, a portion of the conductor being encircled by an insulator which is radially spaced therefrom and of which the upper end provides support for a structural component having the conductor gastightly passed therethrough, the space inside the insulator receiving a sealing gas which is maintained under a pressure higher than that prevailing in the electrical precipitation apparatus, which comprises: using, as the sealing gas, a gas-mixture consisting of an inert gas and at least 10 volume% of methane.
Claim 2
Dependent Claim
102 words
A process for operating a lead-in-device receiving a conductor which passes through the cover of an electrical precipitation apparatus down to its electrode system, a portion of the conductor being encircled by an insulator which is radially spaced therefrom and of which the upper end provides support for a structural component having the conductor gastightly passed therethrough, the space inside the insulator receiving a sealing gas which is maintained under a pressure higher than that prevailing in the electrical precipitation apparatus, which comprises: using, as the sealing gas, a gas-mixture consisting of an inert gas and at least 10 volume% of methane.
Claim 3
Dependent Claim
18 words
The process as claimed in claim 1, wherein the gas mixture contains up to 90 volume% of methane.
Claim 4
Dependent Claim
18 words
The process as claimed in claim 1, wherein the gas mixture contains up to 33 volume% of methane.
Claim 5
Dependent Claim
13 words
The process as claimed in claim 1, wherein the inert gas is nitrogen.
Claim 6
Dependent Claim
19 words
The process as claimed in claim 1, wherein the inert gas is a mixture of nitrogen and carbon dioxide.
Claim 7
Dependent Claim
30 words
The process as claimed in claim 1, wherein the inert gas is a mixture obtained on subjecting natural gas to combustion with air in the stoichiometric hydrocarbon to oxygen ratio.
Claim 8
Dependent Claim
21 words
The process as claimed in claim 1, wherein the sealing gas is made by mixing the inert gas with natural gas.
References Cited (Backward Citations)
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Cited
US3004833A
Cited
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Cited
US3627898A
Cited
US3595983A
Cited
US3755611A
Cited
US3773966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |