Movie film cleaning process using halogenated hydrobromocarbon solvents
US6114293A · kind A · utility
2Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1999 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Jan 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C11/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for cleaning movie film, and especially cellulose acetate based polymer film, without causing film damage, comprises immersing the film into a cleaning solvent composition which comprises one or more halogenated hydrobromocarbons having from 1 to 3 carbons, from 1 to 3 bromine atoms and at least one chlorine or fluorine atom, such as 3-bromo-1,1,1-trifluoropropane, removing the film from the solvent and drying the film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.