US3878440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic capacitor vent
Assignee: Nichicon Corp
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Filing: 1973-07-23
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Granted: 1975-04-15
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Expires: 1993-07-23
Abstract
Abstract A sealed capacitor having a casing including a top wall having portions of reduced thickness so that excessive pressure developed within the casing will rupture the portions of reduced thickness.
Inventors
- 👤 Susumu Ando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:41
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/08; H01G9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
An electrolytic capacitor comprising a cylindrical housing, a wall integrally formed with said housing and closing one end thereof, an electrolytic capacitor within said housing and having terminals extending therefrom, and means closing the other end of said housing with the terminals extending therethrough, said wall having a plurality of wedge-shaped sectors angularly spaced one from the other and radiating outwardly from a common center, the wall portions forming said sectors each having a thickness less than the remaining portions of said wall whereby said sectors form a precise pressure release means should the pressure exceed a predetermined magnitude within said housing.
Claim 2
Dependent Claim
102 words
An electrolytic capacitor comprising a cylindrical housing, a wall integrally formed with said housing and closing one end thereof, an electrolytic capacitor within said housing and having terminals extending therefrom, and means closing the other end of said housing with the terminals extending therethrough, said wall having a plurality of wedge-shaped sectors angularly spaced one from the other and radiating outwardly from a common center, the wall portions forming said sectors each having a thickness less than the remaining portions of said wall whereby said sectors form a precise pressure release means should the pressure exceed a predetermined magnitude within said housing.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |