US3700575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming transparent films of zno
Assignee: National Aeronautics and Space Administration
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Filing: 1969-11-26
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Granted: 1972-10-24
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Expires: 1989-11-26
Abstract
Abstract A METHOD OF FORMING THIN TRANSPARENT FILM OF ZINC OXIDE ON A TRANSPARENT REFRACORY SUBSTRATE, WHICH COMPRISES SPUTTERING PURE ZINC METAL TO FORM A THIN METALLIC FILM ON THE SUBSTRATE AND THEN REACTING THE ZINC FILM WITH OXYGEN FROM AIR TO FORM A LUMINESCENT AND TRANSPARENT ZNO COATING.
Inventors
- 👤 Paul H Egli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:12
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/08; C23C14/086; C23C14/58; C23C14/5806; C23C14/5846; C23C14/5853
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |