Powdered packaged developer
US4816384A · kind A · utility
37Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1986 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Oct 9, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/265
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A storage stable and rapid dissolving packaged powder developer of uniform composition is produced by preparing developer or developer precursor solutions and removing solvent to provide powder for packaging in plastic impervious to the atmosphere. Preferably, the solvent is removed by freeze-drying or spray-drying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.