Patent US3721961A successfully refreshed from Google Patents.
US3756847A
Expired / Lapsed
US
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Method for controlling the composition of a deposited film
Assignee: RCA Corp
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Filing: 1971-11-04
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Granted: 1973-09-04
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Expires: 1991-11-04
Abstract
Abstract DEPOSITION OF A FILM OF A COMPOUND ON A SUBSTRATE BY ELECTRON BEAM EVAPORATION OF THE COMPOUNDS IS CONTROLLED BY REESTABLISHING SUBSTRATE ELECTRICAL POTENTIAL. AN ELECTRICAL POTENTIAL IS APPLIED TO THE SUBSTRATE AND IS PROPERLY ADJUSTED TO ATTRACT OR REPEL A PREDETERMINED PORTION OF THE NEGATIVELY CHARGED IONS FORMED DURING EVAPORATION OF THE COMPOUND.
Inventors
- 👤 Iii F Tams
- 👤 D Leobowitz
- 👤 D Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:29
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/54; C23C14/548
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |