US3669693A
Expired / Lapsed
US
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Germania-silica glasses and method of coating
Assignee: Corning Glass Works
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Filing: 1970-03-19
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Granted: 1972-06-13
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Expires: 1990-03-19
Abstract
Abstract THIS INVENTION RELATES TO GLASS COMPOSITIONS CONSISTING ESSENTIALLY OF GEO2 AND SIO2 WHICH ARE ESPECIALLY SUITABLE AS PROTECTIVE INSULATING SURFACE LAYERS ON SILICON SEMICONDUCTOR DEVICES.
Inventors
- 👤 Robert H Dalton
- 👤 Eugene F Riebling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:50
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/69; H10P14/692; H10P14/6921; H10P14/6922; C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C4/00; H10P14/63; H10P14/6326; H10P14/6342; H10P14/65; H10P14/6516; H10P14/6544; H10P14/69215; H10W; H10W74/00; H10W74/10; H10W74/131; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/118
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |