Patent US3739246A successfully refreshed from Google Patents.
US3739246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for increasing the charge density of insulators
Assignee: Kalle GmbH and Co KG
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Filing: 1970-12-14
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Granted: 1973-06-12
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Expires: 1990-12-14
Abstract
Abstract This invention relates to a process and apparatus for increasing the charge density on the surface of a dielectric material in which electrons and gas ions are produced in the gas space above the surface of the material by means of direct current so that the surface is electrostatically charged. The process is an improvement which comprises producing an electric field of the same polarity above the source which generates the electrons and gas ions, whereby the migration of the electrons and gas ions to the surface of the material is directed.
Inventors
- 👤 G Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:24
CPC Classifications
H; H05; H05F; H05F3/00; H05F3/04; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/915; B29C48/9165; B29C55/00; B29C55/02; B29D; B29D7/00; B29C71/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
62 words
An apparatus for increasing the charge density on a surface of a dielectric material which comprises grounded support means, electrode means mounted above the support means and connected to a D.C. source, and an electrically conductive layer means above the electrode means and being connected to a reference potential over a highly ohmic resistance and insulated from the remainder of the apparatus.
Claim 2
Independent Claim
62 words
An apparatus for increasing the charge density on a surface of a dielectric material which comprises grounded support means, electrode means mounted above the support means and connected to a D.C. source, and an electrically conductive layer means above the electrode means and being connected to a reference potential over a highly ohmic resistance and insulated from the remainder of the apparatus.
Claim 3
Dependent Claim
13 words
An apparatus according to claim 1 including means for heating the electrode means.
Claim 4
Dependent Claim
20 words
An apparatus according to claim 1 including current measuring means between the highly ohmic resistance and the electrically conductive layer.
Claim 5
Dependent Claim
18 words
An apparatus according to claim 1 in which the electrically conductive layer means comprises at least one wire.
Claim 6
Dependent Claim
19 words
An apparatus according to claim 1 in which the electrically conductive layer means comprises at least one metal strip.
Claim 7
Dependent Claim
24 words
An apparatus according to claim 1 in which the electrically conductive layer means comprises at least one conductive layer applied to a dielectric support.
Claim 8
Dependent Claim
22 words
An apparatus according to claim 1 in which the highly ohmic resistance has a resistance of 20 to Infinity M Omega .
References Cited (Backward Citations)
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Cited
US2868989A
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US3196270A
Cited
US3541329A
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US3557367A
Cited
US3554161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |