Patent US2501177A successfully refreshed from Google Patents.
US3560180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass metal sealing technique
Assignee: Lanteris Space LLC
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Filing: 1968-05-15
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Granted: 1971-02-02
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Expires: 1988-05-15
Abstract
Abstract A METHOD OF GLASS SEALING METALLIC PORTIONS OF A LEAD FRAME TO PRODUCE A MICROCIRCUIT FLAT PACK WHEREIN MAGNESIA IS APPLIED TO SURFACE AREAS OF THE LEAD FRAME, THE SURFACE AREAS LAYING INSIDE AND OUTSIDE OF THE METALLIC PORTIONS. A GLASS SEAL RING IS SUPERIMPOSED OVER THE METALLIC PORTIONS AND IS THEN SEALED TO THOSE PORTIONS. THE MAGNESIA PREVENTS THE GLASS FROM WETTING THE SURFACE AREAS TO WHICH THE MAGNESIA WAS APPLIED. THEREAFTER, THE MAGNESIA IS REMOVED.
Inventors
- 👤 Kathleen G Merat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:50
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |