Method for eliminating color developer fog
Abstract
Abstract IT HAS BEEN DISCOVERED THAT FOG INDUCED BY COLOR DEVELOPER SOLUTIONS WHICH INCLUDE A SULFITE ION ANTIOXIDANT, A HYDROXYLAMINE STABILIZER AND A SALT OF AN AMINO POLYCARBOXYLIC ACID AS A HEAVY METAL SEQUESTERING AGENT CAN BE ELIMINATED BY TREATING THE COLOR DEVELOPER SOLUTION WITH AN AMMONIA SCAVENGER FOR EXAMPLE, A BIOLOGICAL SCAVENGER SUCH AS AN ENZYME AND PARTICULARLY CARBAMOYL PHOSPHATE SYNTHETASE AND TRANSAMMINASE ENZYMES FOUND IN ACTIVATED YEAST, OR A CHEMICAL SCAVENGER SUCH AS BORIC ACID OR ACETALDEHYDE, PROTECTED BY A MEMBRANE SELECTIVELY PERMEABLE TO AMMONIA AND STABLE AT PHS ABOVE ABOUT 8.0. THE TECHNIQUE DESCRIBED HEREIN IS EQUALLY EFFECTIVE FOR DEAMMONIATING OTHER AQUEOUS ALKALINE AMMONIACAL SOLUTIONS.
Inventors
- 👤 J Brown
- 👤 L Hotter
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |