Movie film cleaning process
US5669985A · kind A · utility
8Cited by
14References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 29, 1996 |
| Grant date | Sep 23, 1997 |
| Priority date | — |
| Expiry date | Feb 29, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D7/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a solvent system and process for cleaning cellulose triacetate polymer camera film. The solvent system comprises n-propyl bromide and an alkyl bromide in which the alkyl group contains 4 to 7 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.