US3772015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colour photography
Assignee: Ilford Imaging Switzerland GmbH
•
Filing: 1971-07-16
•
Granted: 1973-11-13
•
Expires: 1991-07-16
Abstract
Abstract A process for the manufacture of screened coloured positive direct-viewing images, for rapidly recognising in the printing industry the matching of the separation negatives which the final printed product will display, is described.
Inventors
- 👤 H Kirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:00
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/28; G03F; G03F3/00; G03F3/10; G03F3/107
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
30 words
Process according to claim 1, wherein the exposure times of the colour separations exposed with copying light of the same colour are in the ratio of between 1:10 and 1:1.
Claim 2
Dependent Claim
30 words
Process according to claim 2, wherein the exposure times of the colour separations exposed with copying light of the same colour are in the ratio of between 1:5 to 1:1.4.
Claim 3
Dependent Claim
21 words
Process according to claim 1, which comprises using a photographic material for the silver dye bleach process as the colour-photographic material.
References Cited (Backward Citations)
US3576627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |