G03C - Definition 
Definition statement
This subclass covers:
Photosensitive materials for photographic purposes, including multicolour photosensitive materials or diffusion transfer photosensitive materials
Packages of films for inserting into cameras
Wrapping materials for light-sensitive plates, films, or papers
Photographic processes, including multicolour photographic processes
Diffusion transfer processes for photographic purposes
Photographic agents, including multicolour photographic agents
Diffusion transfer agents for photographic purposes
Regeneration of photographic processing agents, including multicolour photographic processing agents
Stereo-photographic processes or similar processes
Auxiliary processes in photography
Relationship between large subject matter areas
Subclass G03C covers the combination of cinematographic processes and sound-recording, whereas subclass G11B covers sound-recording per se.
References relevant to classification in this subclass
This subclass does not cover:
Photographic processes characterised by the use or manipulation of apparatus classifiable per se in subclass G03B | G03B |
Photographic emulsion plates or blocks in which tracks of nuclear particles are made visible by after-treatment | G01T 5/10 |
Informative references
Attention is drawn to the following places, which may be of interest for search:
Organic dyes or closely-related compounds for producing dyes | C09B |
Tenebrescent materials | C09K 9/00 |
Photomechanical production of textured or patterned surfaces; Materials or originals therefor; Apparatus specially adapted therefor | G03F |
Electrography; Electrophotography; Magnetography | G03G |
Glossary of terms
In this subclass, the following terms or expressions are used with the meaning indicated:
| Emulsion | Dispersion, i.e. a distribution of finely divided particles in a medium |
| Optical | Applies to visible light, but also to ultraviolet radiation or infrared radiation |
| Photosensitive composition | Photosensitive substance, e.g. silver halide, and, if applicable, binder or additives |
| Photosensitive material | Photosensitive composition, e.g. emulsion, the base carrying it, and, if applicable, auxiliary layers |