US3209070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colour reproduction systems
Assignee: Crosfield Electronics Ltd
•
Filing: 1961-06-02
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Granted: 1965-09-28
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Expires: 1981-06-02
Abstract
No abstract record available.
Inventors
- 👤 Mawby David Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:37
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6016; H04N1/6022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
APPARATUS FOR OBTAINING REPRODUCTIONS OF COLOURED ORIGINALS BY A METHOD EMPLOYING A BLACK PRINTER, COMPRISING, FOR OBTAINING THE BLACK PRINTER; AN ELECTRO-OPTICAL SCANNER FOR DERIVING COLOUR CHANNEL SIGNALS REPRESENTING THE PRIMARY COLOUR COMPONENTS OF SCANNED ELEMENTS OF THE ORIGINAL; A MINIMUM SIGNAL SELECTOR CIRCUIT AND A MAXIMUM SIGNAL SELECTOR CIRCUIT WHICH EACH RECEIVE ALL THE COLOUR CHANNEL SIGNALS FROM THE SCANNER; MEANS FOR ADDING THE OUTPUTS OF THE MINIMUM SIGNAL SELECTOR CIR-
Claim 2
Dependent Claim
72 words
APPARATUS FOR OBTAINING REPRODUCTIONS OF COLOURED ORIGINALS BY A METHOD EMPLOYING A BLACK PRINTER, COMPRISING, FOR OBTAINING THE BLACK PRINTER; AN ELECTRO-OPTICAL SCANNER FOR DERIVING COLOUR CHANNEL SIGNALS REPRESENTING THE PRIMARY COLOUR COMPONENTS OF SCANNED ELEMENTS OF THE ORIGINAL; A MINIMUM SIGNAL SELECTOR CIRCUIT AND A MAXIMUM SIGNAL SELECTOR CIRCUIT WHICH EACH RECEIVE ALL THE COLOUR CHANNEL SIGNALS FROM THE SCANNER; MEANS FOR ADDING THE OUTPUTS OF THE MINIMUM SIGNAL SELECTOR CIR-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |