Patent US2998556A successfully refreshed from Google Patents.
US2998556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-conductor device
Assignee: US Philips Corp
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Filing: 1959-03-04
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Granted: 1961-08-29
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Expires: 1979-03-04
Abstract
No abstract record available.
Inventors
- 👤 Pritchard John
- 👤 Brookes Geoffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:35
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/40; H10W76/42; H10W76/48; H10W72/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A SEMI-CONDUCTOR DEVICE COMPRISING A SEMI-CONDUCTIVE BODY HAVING AN ACTIVE SURFACE PORTION, MEANS HERMETICALLY SEALING OFF AND ENCLOSING SAID ACTIVE SURFACE PORTION, AND BORON OXIDE WITHIN SAID MEANS FOR IMPROVING THE ELECTRICAL STABILITY OF THE DEVICE.
Claim 2
Dependent Claim
36 words
A SEMI-CONDUCTOR DEVICE COMPRISING A SEMI-CONDUCTIVE BODY HAVING AN ACTIVE SURFACE PORTION, MEANS HERMETICALLY SEALING OFF AND ENCLOSING SAID ACTIVE SURFACE PORTION, AND BORON OXIDE WITHIN SAID MEANS FOR IMPROVING THE ELECTRICAL STABILITY OF THE DEVICE.
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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |