Patent US3854944A successfully refreshed from Google Patents.
US3854944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of a sound track with anti-foggant in the redeveloper solution
Assignee: Agfa Gevaert NV
•
Filing: 1972-11-24
•
Granted: 1974-12-17
•
Expires: 1992-11-24
Abstract
Abstract A method for producing a sound track on a photographic silver halide type colour material wherein after bleaching the silver contained in the colour-developed material, only the sound track area of the material is treated with a redeveloper composition comprising a developing agent and an organic heterocyclic compound containing in a 5- or 6-membered heterocyclic ring a structural part corresponding with one of the following tautomeric structural groups.
Inventors
- 👤 C Vandeputte
- 👤 R Huybrechts
- 👤 D Gallois
- 👤 R Verbrugghe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:46
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/22; G03C7/24
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
88 words
IN A METHOD FOR PRODUCING A SOUND TRACK ON A PHOTOGRAPHIC SILVER HALIDE TYPE COLOR MATERIAL WHEREIN AFTER BLEACHING THE SILVER CONTAINED IN THE COLOR-DEVELOPED MATERIAL, ONLY THE SOUND TRACK AREA OF THE MATERIAL IS TREATED WITH A REDEVELOPER COMPOSITION AND THEN THE ENTIRE MATERIAL IS RINSED AND SUBJECTED TO A FIXING TREATMENT TO REMOVE THE SILVER COMPOUNDS REMAINING AFTER BLEACHING, THE IMPROVEMENT OF USING A REDEVELOPER COMPOSITION COMPRISING A DEVELOPING AGENT AND A FOG-INHIBITING ORGANIC HETEROCYCLIC COMPOUND HAVING THE FOLLOWING STRUCTURAL FORMULA OR A TAUTOMERIC FORM THEREOF:
Claim 2
Dependent Claim
88 words
IN A METHOD FOR PRODUCING A SOUND TRACK ON A PHOTOGRAPHIC SILVER HALIDE TYPE COLOR MATERIAL WHEREIN AFTER BLEACHING THE SILVER CONTAINED IN THE COLOR-DEVELOPED MATERIAL, ONLY THE SOUND TRACK AREA OF THE MATERIAL IS TREATED WITH A REDEVELOPER COMPOSITION AND THEN THE ENTIRE MATERIAL IS RINSED AND SUBJECTED TO A FIXING TREATMENT TO REMOVE THE SILVER COMPOUNDS REMAINING AFTER BLEACHING, THE IMPROVEMENT OF USING A REDEVELOPER COMPOSITION COMPRISING A DEVELOPING AGENT AND A FOG-INHIBITING ORGANIC HETEROCYCLIC COMPOUND HAVING THE FOLLOWING STRUCTURAL FORMULA OR A TAUTOMERIC FORM THEREOF:
Claim 3
Dependent Claim
27 words
Method according to claim 1, wherein a sound track is produced on a photographic silver halide colour film by applying a reversal processing containing the following steps:
Claim 4
Dependent Claim
24 words
simultaneously or subsequently to said image-wise exposure photo-exposing the film in its area intended for the sound track through a negative sound track original,
Claim 5
Dependent Claim
24 words
simultaneously or subsequently to said image-wise exposure photo-exposing the film in its area intended for the sound track through a negative sound track original,
Claim 6
Dependent Claim
29 words
black-and-white developing the film in order to produce negative silver images in the picture areas and a positive sound track record in the sound track area of the film,
Claim 7
Dependent Claim
29 words
black-and-white developing the film in order to produce negative silver images in the picture areas and a positive sound track record in the sound track area of the film,
Claim 8
Dependent Claim
39 words
Method according to claim 1, wherein said organic heterocyclic compound is at least one of the following compounds: Delta 2-1,2,4-triazoline-5-thione, 3-amino- Delta 2-1,2,4-triazoline-5-thione, 5-amino- Delta 4-1,3,4-oxadiazoline-2-thione, 5-amino- Delta 4-1,3,4-thiadiazoline-2-thione, 1,3,4-thiazolidine-2,5-dithione, 3-methyl-1,3,4-thiadiazolidine-2,5-dithione, 5,5-dimethyl-2-thio-thiazolidine-2,4-dione, 2-thio-tetrahydro-1,3-thiazoline-2,4-dione, 5,5-dimethyl-2-thio-tetrahydro-1,3-thiazine-2,4-dione, 4,6-dimethyl-1,2-dihydro-pyrimidine-2-thione, 6-methyl-2-thio-1,2,3,4-tetrahydro-pyrimidine-2,4-dione, 6-amino-2-thio-1,2,3,4-tetrahydro-pyrimidine-2,4-dione-, and 4,6-diamino-1,2-dihydro-pyrimidine-2-thione.
Claim 9
Dependent Claim
24 words
Method according to claim 1, wherein the concentration of the organic heterocyclic compound varies between 0.1 and 5.0 g per litre of re-developer solution.
Claim 10
Dependent Claim
18 words
treating the sound track area with a fixing composition that complexes the residual silver halide in this area,
Claim 11
Dependent Claim
18 words
treating the sound track area with a fixing composition that complexes the residual silver halide in this area,
Claim 12
Dependent Claim
15 words
re-exposing the film to visible light, the re-exposure being performed after step 3 or 4,
Claim 13
Dependent Claim
15 words
re-exposing the film to visible light, the re-exposure being performed after step 3 or 4,
Claim 14
Dependent Claim
27 words
washing the thus treated film, thereby removing the complexed silver halide of the sound track area and leaving the non-developed silver halide of the picture areas unaffected,
Claim 15
Dependent Claim
27 words
washing the thus treated film, thereby removing the complexed silver halide of the sound track area and leaving the non-developed silver halide of the picture areas unaffected,
Claim 16
Dependent Claim
4 words
colour-dEvelopment of the film,
Claim 17
Dependent Claim
4 words
colour-dEvelopment of the film,
Claim 18
Dependent Claim
1 words
rinsing,
Claim 19
Dependent Claim
1 words
rinsing,
Claim 20
Dependent Claim
28 words
overall fixing whereby the possibly still present undeveloped silver halide is complexed and removed, leaving the colour-developed picture unaffected and having no effect on the sound track area,
Claim 21
Dependent Claim
28 words
overall fixing whereby the possibly still present undeveloped silver halide is complexed and removed, leaving the colour-developed picture unaffected and having no effect on the sound track area,
Claim 22
Dependent Claim
33 words
treating the colour-developed film with a substance or substances that reoxidize the developed silver, which results in the bleaching of the silver of the picture as well as of the sound track areas,
Claim 23
Dependent Claim
33 words
treating the colour-developed film with a substance or substances that reoxidize the developed silver, which results in the bleaching of the silver of the picture as well as of the sound track areas,
Claim 24
Dependent Claim
20 words
removing the surplus of the bleaching substance or substances and its water-soluble reaction products by rinsing and drying the film,
Claim 25
Dependent Claim
20 words
removing the surplus of the bleaching substance or substances and its water-soluble reaction products by rinsing and drying the film,
Claim 26
Dependent Claim
16 words
subjecting only the sound track area to a redevelopment with the developer solution of claim 1
Claim 27
Dependent Claim
25 words
rinsing the film and removing the silver compounds obtained in the bleaching step from the picture areas by a fixing treatment with a complexing agent,
Claim 28
Dependent Claim
25 words
rinsing the film and removing the silver compounds obtained in the bleaching step from the picture areas by a fixing treatment with a complexing agent,
Claim 29
Dependent Claim
15 words
optionally treating the processed film with a colloid hardening agent and/or a colour stabilizing agent.
Claim 30
Dependent Claim
15 words
optionally treating the processed film with a colloid hardening agent and/or a colour stabilizing agent.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |