Cleaning method and system
US5240507A · kind A · utility
38Cited by
3References
20Claims
0Family size
Inventors
Key dates
| Filing date | Nov 5, 1991 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Nov 5, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06F43/086
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A closed circuit solvent cleaning method and system in which the object to be cleaned is placed in a chamber and subjected to a negative gauge pressure to remove air and other non-condensible gases, after which a solvent is introduced to the evacuated chamber and the object is cleaned. Following this, the solvent is recovered from the object and chamber and then the clean object is removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.