Patent US3667002A successfully refreshed from Google Patents.
US3667002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strip configuration for capacitors
Assignee: Duracell Inc USA
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Filing: 1970-06-01
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Granted: 1972-05-30
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Expires: 1990-06-01
Abstract
Abstract The present invention relates to a configuration which is an integral part of the anode structure of an electrolytic capacitor. A strip of film-forming metal includes at least one appendage which has formed therein a depression which serves as the retaining means for a bonded mass of film-forming metal. The appendage also includes a reduced neck portion. The appendage and the mass of film-forming metal have an oxide layer, a semiconductor layer and a conductive layer formed thereover. Terminal means includes one extremity having a bent end portion connected to the reduced neck portion and includes another extremity having a substantially flatten end portion connected to the conductive layer carried by the bonded mass of film-forming metal.
Inventors
- 👤 Gerhart P Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:43
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/0029
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
In a capacitor, having a mass of bonded film-forming metal powders with a myriad of intercommunicating voids, a metal oxide layer formed over the surface of said metal powders, a semiconductor electrolyte layer formed over the said metal oxide layer, a contact layer formed over the electrolyte layer, and a housing encapsulating said capacitor; the improvement comprising; a cup-shaped means including a depression containing said mass of bonded film-forming metal powders, said mass being integrally bonded to said cup-shaped means, a neck portion integrally connected to and projecting from the cup-shaped means, and terminal means including at least one anode lead attached to said neck portion at a location spaced from said cup-shaped means, and said terminal means including at least one cathode lead attached to said contact layer.
Claim 2
Dependent Claim
129 words
In a capacitor, having a mass of bonded film-forming metal powders with a myriad of intercommunicating voids, a metal oxide layer formed over the surface of said metal powders, a semiconductor electrolyte layer formed over the said metal oxide layer, a contact layer formed over the electrolyte layer, and a housing encapsulating said capacitor; the improvement comprising; a cup-shaped means including a depression containing said mass of bonded film-forming metal powders, said mass being integrally bonded to said cup-shaped means, a neck portion integrally connected to and projecting from the cup-shaped means, and terminal means including at least one anode lead attached to said neck portion at a location spaced from said cup-shaped means, and said terminal means including at least one cathode lead attached to said contact layer.
Claim 3
Dependent Claim
20 words
In the capacitor of claim 1, wherein said anode lead includes a bent over portion attached to said neck portion.
Claim 4
Dependent Claim
33 words
In the capacitor of claim 1, further including means for strengthening said neck portion between said cup-shaped means and the area where said anode lead means is attached to said reduced neck portion.
Claim 5
Dependent Claim
30 words
In the capacitor of claim 3, wherein said means for strengthening said neck portion is a gradual reduction for the width of said neck portion starting at said cup-shaped means.
Claim 6
Dependent Claim
29 words
In the capacitor of claim 4, wherein the gradual reduction of said neck portion is confined to about the initial two-sevenths of the entire length of said neck portion.
Claim 7
Dependent Claim
33 words
In the capacitor of claim 4, wherein said means for strengthening said neck portion further includes rib means which extends the length of said gradual reduction of said width of said neck portion.
Claim 8
Dependent Claim
13 words
In the capacitor of claim 1, wherein the cup-shaped means is substantially rectangular-shaped.
Claim 9
Dependent Claim
25 words
In the capacitor of claim 7, wherein the anode attachment is along substantially the entire longitudinal length of one side of said rectangular-shaped cup means.
Claim 10
Dependent Claim
25 words
In the capacitor of claim 7, wherein said film-forming metal of said cup means and said mass of bonded film-forming metal particles is the same.
Claim 11
Dependent Claim
23 words
In the capacitor of claim 9, wherein film-forming metal is selected from the group consisting of tantalum, aluminum, titanium, niobium, hafnium and zirconium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |