UST862019I4 - Defensive publication - Google Patents
Defensive publication Download PDFInfo
- Publication number
- UST862019I4 UST862019I4 US862019DH UST862019I4 US T862019 I4 UST862019 I4 US T862019I4 US 862019D H US862019D H US 862019DH US T862019 I4 UST862019 I4 US T862019I4
- Authority
- US
- United States
- Prior art keywords
- defensive publication
- sulfite
- developer
- published
- complex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/29—Development processes or agents therefor
- G03C5/305—Additives other than developers
Definitions
- a photographic developer for high contrast elements comprises an alkaline development activator, a silver halide developing agent, sulfite ions and a sulfite ion buffer, which is a complex of sulfite ions with a trinitroaryl compound, such as 2,4,6-ttrinitrobenzoic acid, the complex having an absorption peak between about 450 and 600 millimicrons.
- a suitable developer is a lith developer, for example, which is an aqueous alkaline solution containing a silver halide developing agent, such as hydroquinone; sulfite ions, such as from sodium sulfite and sodium bisulfite; and 2,4,6-trinitrobenzoic acid, the trinitrobenzoic acid and sulfite compounds forming a complex in situ which is a sulfite ion buffer in the developer.
- a lith developer for example, which is an aqueous alkaline solution containing a silver halide developing agent, such as hydroquinone; sulfite ions, such as from sodium sulfite and sodium bisulfite; and 2,4,6-trinitrobenzoic acid, the trinitrobenzoic acid and sulfite compounds forming a complex in situ which is a sulfite ion buffer in the developer.
- This can be used in a process, such as a continuous process, for developing images in an exposed photographic
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Description
Tg 16 l l DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 O.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for 30 cents per sheet.
Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Office makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED MAY 27, 1969 789 377 PHOTOGRAPHIC DEVELOPER AND PROCESS William E. Lee, Kodak Park Division, Rochester, N.Y. 14650 Filed Jan. 6, 1969. Published May 27, 1969 Int. Cl. G03c 5/30 U.S. C]. 96-66 No Drawing. 14 Pages Specification A photographic developer for high contrast elements comprises an alkaline development activator, a silver halide developing agent, sulfite ions and a sulfite ion buffer, which is a complex of sulfite ions with a trinitroaryl compound, such as 2,4,6-ttrinitrobenzoic acid, the complex having an absorption peak between about 450 and 600 millimicrons. A suitable developer is a lith developer, for example, which is an aqueous alkaline solution containing a silver halide developing agent, such as hydroquinone; sulfite ions, such as from sodium sulfite and sodium bisulfite; and 2,4,6-trinitrobenzoic acid, the trinitrobenzoic acid and sulfite compounds forming a complex in situ which is a sulfite ion buffer in the developer. This can be used in a process, such as a continuous process, for developing images in an exposed photographic element, such as a photographic element employed in the graphic arts.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US78937769A | 1969-01-06 | 1969-01-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST862019I4 true UST862019I4 (en) | 1969-05-27 |
Family
ID=25147466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US862019D Pending UST862019I4 (en) | 1969-01-06 | 1969-01-06 | Defensive publication |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | UST862019I4 (en) |
| FR (1) | FR2003604A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5942378A (en) * | 1998-05-18 | 1999-08-24 | Eastman Kodak Company | Yellow dye-containing developing composition and its use in two-stage processing of roomlight handleable black-and-white photographic elements |
-
1969
- 1969-01-06 US US862019D patent/UST862019I4/en active Pending
- 1969-06-24 FR FR6921042A patent/FR2003604A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR2003604A1 (en) | 1969-11-07 |
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