US3989987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical capacitor having supply members connected to the coatings
Assignee: US Philips Corp
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Filing: 1975-07-23
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Granted: 1976-11-02
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Expires: 1995-07-23
Abstract
Abstract A capacitor which has been given a predetermined capacitance by sand-blasting, in which an additional metal layer of higher conductivity is galvanically deposited over the electrodes, over the junctions of the supply wire and the electrode, and over a portion of the supply wire.
Inventors
- 👤 Henricus Hubertus Marie Vorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:47
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/228
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
82 words
An electrical capacitor, comprising a dielectric provided with metal coatings, at least one supply member soldered to each of said coatings, the area of said one soldered connection between one of said supply members and a corresponding coating being covered by an additional layer of metal having a smaller specific resistance than the solder, said layer being deposited after the connection has been made, with said metal layer extending over at least the coating in the immediate vicinity of the soldering area.
Claim 2
Dependent Claim
82 words
An electrical capacitor, comprising a dielectric provided with metal coatings, at least one supply member soldered to each of said coatings, the area of said one soldered connection between one of said supply members and a corresponding coating being covered by an additional layer of metal having a smaller specific resistance than the solder, said layer being deposited after the connection has been made, with said metal layer extending over at least the coating in the immediate vicinity of the soldering area.
Claim 3
Dependent Claim
34 words
The capacitor as defined in claim 1 wherein said additional metal layer extends as far as an edge of the coating where this coating has been locally removed in advance by a mechanical operation.
Claim 4
Dependent Claim
18 words
The capacitor as defined in claim 1 wherein said additional metal layer is deposited in a salt bath.
Claim 5
Dependent Claim
15 words
The capacitor as defined in claim 1 wherein said additional metal layer consists of aluminum.
Claim 6
Dependent Claim
15 words
The capacitor as defined in claim 1 wherein said additional metal layer consists of copper.
Claim 7
Dependent Claim
15 words
The capacitor as defined in claim 1 wherein said additional metal layer consists of silver.
Claim 8
Dependent Claim
15 words
The capacitor as defined in claim 1 wherein said additional metal layer consists of gold.
Claim 9
Dependent Claim
15 words
The capacitor as defined in claim 1 wherein said additional metal layer consists of platinum.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |