US3628104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetically sealed aluminum electrolytic capacitor
Assignee: Sprague Electric Co
•
Filing: 1969-12-08
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Granted: 1971-12-14
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Expires: 1989-12-08
Abstract
Abstract An aluminum foil electrolytic capacitor having tantalum to glass hermetic end seals.
Inventors
- 👤 Mark Markarian
- 👤 Robert J Mcdonough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:53
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/08; H01G9/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
48 words
The capacitor of claim 1 wherein said casing is a tube, a second said seal welded to said casing to hermetically seal the other end of said casing, the tantalum leadwire of said second seal being electrically connected to the other of said aluminum electrodes within said casing.
Claim 2
Dependent Claim
33 words
The capacitor of claim 2 wherein said electrodes are aluminum foils that are convolutely wound and separated by said dielectric, and said tantalum leadwires are each joined to aluminum tabs on said foils.
Claim 3
Dependent Claim
14 words
The capacitor of claim 2 wherein said casing and ring members are stainless steel.
Claim 4
Dependent Claim
19 words
The capacitor of claim 4 wherein said lead wires are electrically connected to said electrode foils by lap welding.
Claim 5
Dependent Claim
19 words
The capacitor of claim 4 wherein said lead wires are electrically connected to said electrode foils by projection welding.
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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |