US3837863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing light-sensitive silver halide photographic materials
Assignee: Konica Minolta Inc
•
Filing: 1972-06-19
•
Granted: 1974-09-24
•
Expires: 1992-06-19
Abstract
Abstract Light-sensitive photographic materials are prepared by incorporating various photographic additives into definite layers of light-sensitive silver halide photographic materials. The photographic additives are dissolved in a solvent and are then dispersed in a silver halide-gelatin colloid. The solvent used is a halogenated alcohol of the general formula (I) or (II), wherein R1, R2 and R3 are individually a hydrogen atom, a chlorine atom or a hydroxy group, two of them being a chlorine atom and a hydroxy group, or D R A W I N G
Inventors
- 👤 K Mine
- 👤 M Kanbe
- 👤 K Sakazume
- 👤 E Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:02
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
26 words
A process for preparing a light-sensitive silver halide photographic material as claimed in claim 1, wherein said solvent solution is added to a hydrophilic colloid dispersion.
Claim 2
Dependent Claim
33 words
A process for preparing a light-sensitive silver halide photographic material as claimed in claim 1, wherein said photographic additive is a sensitizing dye, a pigment, a stabilizer, a hardener or a coating aid.
Claim 3
Dependent Claim
26 words
A process for preparing a light-sensitive silver halide photographic material as claimed in claim 1, wherein said solvent is at selected from the group consisting of:
Claim 4
Independent Claim
44 words
A method of incorporating a difficulty water- or lower alcohol-soluble photographic additive into a hydrophilic colloid-containing layer of a light-sensitive silver halide photographic element, which comprises dissolving said photographic additive into a solvent selected from the group consisting of compounds of the general formula
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |