Patent US3576474A successfully refreshed from Google Patents.
US3576474A
Expired / Lapsed
US
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Passivated power rectifier
Assignee: Motors Liquidation Co
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Filing: 1968-02-23
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Granted: 1971-04-27
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Expires: 1988-02-23
Abstract
Abstract An improved hermetically sealed semiconductor device and the method of making that device. The improvement inhibits deterioration of the electrical characteristics of hermetically sealed semiconductor devices having a getter body included within the sealed housing for environmental control therein, along with the semiconductive body. A small quantity of insulating liquid is added to the housing sufficient to cover the surface of the semiconductive body but insufficient to cover an effective area of the getter body.
Inventors
- 👤 Frank X Huber
- 👤 Samuel E Miller
- 👤 James E Reynolds
- 👤 Albert D Rittmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:17
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/40; H10W76/42; H10W76/48; H10W72/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB873916A
Cited
US3176382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |