Patent US3821794A successfully refreshed from Google Patents.
US3821794A
Expired / Lapsed
US
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Photographic color film televising apparatus
Assignee: Nippon Columbia Co Ltd
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Filing: 1971-12-08
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Granted: 1974-06-28
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Expires: 1991-12-08
Abstract
Abstract A SINGLE-TUBE PHOTOGRAPHIC COLOR FILM TELEVISING APPARATUS HAVING AN OPTICAL SYSTEM. IN THIS CASE THE OPTICAL SYSTEM CONSISTS OF A DEVICE FOR FOURIER TRANSFORMATION OF AN IMAGE TO BE TELEVISED AND A SPATIAL FILTER FOR BAND-WIDTH LIMITATION OF THREE COLOR COMPONENTS OF SAID IMAGE TO PREVENT OCCURRENCE OF SPURIOUS SIGNALS DUE TO CROSSTALK BETWEEN SAID THREE COLOR COMPONENTS.
Inventors
- 👤 M Yoneyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:29
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/11; G; G03; G03B; G03B33/00
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |