US3743586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a color encoding filter assembly
Assignee: RCA Corp
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Filing: 1971-04-05
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Granted: 1973-07-03
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Expires: 1991-04-05
Abstract
Abstract A METHOD OF MAKING A COLOR ENCODING FILTER ASSEMBLY INCLUDES THE STEPS OF DEPOSITING A FIRST OPTICAL FILTER LAYER ON A SUBSTRATE AND REMOVING SELECTED PORTIONS OF THE FILTER LAYER BY RADIO FREQUENCY SPUTTER ETCHING TO PRODUCE A FIRST PATTERN IN THE FILTER LAYER. A SECOND FILTER LAYER IS THEN DEPOSITED DIRECTLY ON THE SUBSTRATE AND THE FIRST FILTER LAYER. SELECTED PORTIONS OF THE SECOND FILTER LAYER ARE REMOVED TO PRODUCE A SECOND PATTERN SUPERIMPOSED ON THE FIRST PATTERN.
Inventors
- 👤 J Vossen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:29
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/34; C23C14/35; H; H04; H04N; H04N23/00; H04N23/10; H04N23/12
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |