US4075014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color picture development process
Assignee: Grabig Walter Tetenal Photowerk
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Filing: 1976-02-12
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Granted: 1978-02-21
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Expires: 1996-02-12
Abstract
Abstract The invention relates to a color-positive process for producing a color surface picture using color paper having diffusion-resistant and protected color couplers or plastic-coated or plastic uncoated color paper of color negatives, and features color developing the picture at a temperature in the range of from about 20 DEG C to about 50 DEG C with a developer having added thereto a development accelerator having the formula: <IMAGE> wherein R1 and R2 are H, CH3, or CH2-CH3 and "n" is in the range of from 1 to 4, bleach fixing and stabilizing the picture in a solution having a pH from about 5.5 to about 6.0 without an intermediate step of washing or a stop-fixing bath, and thereafter, washing the picture.
Inventors
- 👤 Wolfgang Gerhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:18
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413; G03C7/42; G03C7/421
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
145 words
A color-positive process for producing a color surface picture using an image exposed color paper having diffusion-resistant and protected color couplers or plastic-coated or plastic-uncoated color paper of color negatives, the steps comprising: color developing the picture at a temperature in the range of from about 20° C to about 50° C with a paraphenylene diamine developer having added thereto a development accelerator having the formula: ##STR4## wherein R 1 and R 2 are H, CH 3 , or CH 2 --CH 3 and n is in the range of 1 to 4; bleach fixing and stabilizing the picture in a solution including ethylene-diamine tetraacetic acid iron-sodium complex, ammonium thiosulfate and sodium sulfite, said solution having a pH of from about 5.5 to about 6.0, said process being carried out without any intermediate step of washing or a stop-fixing bath; and thereafter, washing the picture.
Claim 2
Dependent Claim
145 words
A color-positive process for producing a color surface picture using an image exposed color paper having diffusion-resistant and protected color couplers or plastic-coated or plastic-uncoated color paper of color negatives, the steps comprising: color developing the picture at a temperature in the range of from about 20° C to about 50° C with a paraphenylene diamine developer having added thereto a development accelerator having the formula: ##STR4## wherein R 1 and R 2 are H, CH 3 , or CH 2 --CH 3 and n is in the range of 1 to 4; bleach fixing and stabilizing the picture in a solution including ethylene-diamine tetraacetic acid iron-sodium complex, ammonium thiosulfate and sodium sulfite, said solution having a pH of from about 5.5 to about 6.0, said process being carried out without any intermediate step of washing or a stop-fixing bath; and thereafter, washing the picture.
Claim 3
Dependent Claim
20 words
The process as claimed in claim 1, wherein the solution for the bleach-fixing includes a benzotriazole or a substituted benzotriazole.
Claim 4
Dependent Claim
14 words
The process as claimed in claim 2, wherein the temperature is about 23° C.
Claim 5
Dependent Claim
64 words
The process as claimed in claim 1, wherein the developer includes a preservative, alkali, a retarder, and diffusion regulators, and and wherein the bleach fix solution includes a halogen-alkylated amino benzotriazole having a strong post-development inhibiting effect and a UV absorber which remains in the emulsion to a sufficient extent after washing to protect the image dyes from bleaching under the action of light.
Claim 6
Dependent Claim
14 words
The process as claimed in claim 1, wherein the developer includes temperature-dependent diffusion regulators.
Claim 7
Dependent Claim
23 words
The process as claimed in claim 5, wherein the developer includes hydroxyalkyl amines as the accelerator and ω-alkylated-α,-dihydroxyethers as the temperature-dependent diffusion regulators.
Claim 8
Dependent Claim
26 words
The process as defined in claim 1, wherein said accelerator is employed in amounts of from about 0.4 to about 5.0ml/l of solution of said developer.
Claim 9
Dependent Claim
43 words
The process as defined in claim 1, wherein the developer further includes about 5 to 15 ml/l of a glycol ether having the following formula HO -- (CH.sub.2).sub.n -- O -- (CH.sub.2).sub.n -- OH wherein n is an integer of 1 - 4.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |