Patent US3791955A successfully refreshed from Google Patents.
US3791955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of chalcogenide glass sputtering targets
Assignee: Verizon Laboratories Inc
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Filing: 1972-12-11
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Granted: 1974-02-12
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Expires: 1992-12-11
Abstract
Abstract A METHOD OF PREPARING LARGE AREA CHALCOGENIDE GLASS SPUTTERING TARGETS. THESE TARGETS ARE PREPARED IN AN EVACUATED CHAMBER OR INERT GAS ATMOSPHERE BY HEATING A BOULE OF CHALCOGENIDE IN A QUARTZ DISH TO CONTOUR THE BOTTOM FACE OF THE TARGET. WHILE HEATING THE BOULE, A WEIGHT FORCES A WIRE MESH WITH A STUD ATTACHED INTO THE TOP SURFACE OF THE BOULE. AFTER A PREDETERMINED TIME TO INSURE GOOD PHYSICAL BOND BETWEEN GLASS AND MESH, THE CHAMBER IS COOLED TO AMBIENT AND THE SPUTTERING TARGET (CHALCOGENIDE GLASSMESH-STUD) MAY BE REMOVED.
Inventors
- 👤 R Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:06
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/0623; C23C14/22; C23C14/34; C23C14/3407; C23C14/3414
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |