Patent US4165836A successfully refreshed from Google Patents.
Patent US3967000A successfully refreshed from Google Patents.
US3967000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Riser protection for anodes
Assignee: Duracell Inc USA
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Filing: 1974-06-13
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Granted: 1976-06-29
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Expires: 1994-06-13
Abstract
Abstract A protective layer containing polytetrafluoroethylene (PTFE) is provided over the riser of an anode having a porous film-forming metal anode body to render the riser non-wetting to a solution of manganese nitrate and thereby help prevent the formation of MnO 2 on the riser during the subsequent pyrolysis step in the process of making a capacitor. The protective layer also helps to prevent mechanical damage to the anode during assembly of the capacitor. The protective layer over the anode riser may be applied by means such as dipping a wetted anode in a suspension containing particulate PTFE or by masking the anode body with a liquid and then spraying the riser with binderless material containing PTFE. The preferred embodiment employs high pressure spraying of the material containing PTFE over the anode riser.
Inventors
- 👤 Gerhart P. Klein
- 👤 Milton Kallianidis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:59
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/008; H01G9/012; B; B05; B05D; B05D1/00; B05D1/02; B05D1/12; B05D1/32; B05D2258/00; B05D5/00; B05D5/08; B05D5/083
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
92 words
A method of applying a layer of material containing polytetrafluorethylene over a riser of an anode adapted for use in an electrical device comprising providing an anode comprising a body including electrically conducting material and a riser projecting from the body, masking the anode body with a liquid, directing particles of a material consisting essentially of polytetrafluorethylene entrained in a medium toward the anode, and depositing particles of said material over the anode riser, said masking liquid being of such a nature that said particles will not adhere to the anode body.
Claim 2
Independent Claim
92 words
A method of applying a layer of material containing polytetrafluorethylene over a riser of an anode adapted for use in an electrical device comprising providing an anode comprising a body including electrically conducting material and a riser projecting from the body, masking the anode body with a liquid, directing particles of a material consisting essentially of polytetrafluorethylene entrained in a medium toward the anode, and depositing particles of said material over the anode riser, said masking liquid being of such a nature that said particles will not adhere to the anode body.
Claim 3
Dependent Claim
33 words
A method according to claim 1, wherein the anode body is masked by dipping the anode into a liquid containing water prior to the step of depositing particles of material over the anode.
Claim 4
Dependent Claim
26 words
The method of claim 2, wherein excess material on the anode body is removed by rinsing subsequent to depositing the particles of material over the anode.
Claim 5
Dependent Claim
18 words
The method of claim 1, wherein the anode body is masked by applying water to the anode body.
Claim 6
Dependent Claim
28 words
The method of claim 4, wherein the directing of particles of material is done under pressure sufficient for the material particles to deform upon impact with the anode.
Claim 7
Independent Claim
88 words
A method of applying a layer of material containing polytetrafluoroethylene over a riser of an anode adapted for use in an electrical device comprising providing an anode comprising a porous anode body including electrically conducting material and a metal riser projecting from the body, applying a liquid to the anode, and applying to the anode a suspension containing particulate polytetrafluoroethylene and an organic liquid which is immiscible with the liquid, the liquid being of such a nature that the particulate polytetrafluoroethylene will not adhere to the anode body.
Claim 8
Independent Claim
88 words
A method of applying a layer of material containing polytetrafluoroethylene over a riser of an anode adapted for use in an electrical device comprising providing an anode comprising a porous anode body including electrically conducting material and a metal riser projecting from the body, applying a liquid to the anode, and applying to the anode a suspension containing particulate polytetrafluoroethylene and an organic liquid which is immiscible with the liquid, the liquid being of such a nature that the particulate polytetrafluoroethylene will not adhere to the anode body.
Claim 9
Dependent Claim
23 words
The method of claim 6, wherein excess material on the anode body is removed by rinsing after the step of applying the suspension.
Claim 10
Dependent Claim
22 words
The method of claim 6, wherein the liquid and the suspension are applied by dipping and the liquid consists predominantly of water.
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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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |