Photographic stabilizer compositions
Abstract
Abstract AQUEOUS STABILIZER COMPOSITION COMPRISING (1) A WATER-SOLUBLE ADDITION COMPLEX OF AN ALKALI METAL BISULFITE AND AN ALDEHYDE THAT PREFERABLY CONTAINS FROM ONE TO SIX CARBON ATOMS AND FROM ONE TO THREE CARBONYL GROUPS WITH AT LEAST ONE OF THE CARBONYL GROUPS BEING PART OF AN ALDEHYDE GROUP IN THE CONCENTRATION RANGE OF FROM ABOUT 0.5 G./L. TO ABOUT 100 G./L. AND EITHER, (2) A SUFFICIENT AMOUNT OF AN ALKALI METAL HYDROXIDE OR AN ACID TO ADJUST THE PH OF THE COMPRISING IN THE RANGE OF FROM 3 TO 7, OR (3) A BUFFER COMPRISING (A) AN ACID, SUCH AS, SULFURIC, NITRIC, PHOSPHORIC, BORIC, HYDROCHLORIC ACIDS AND ORGANIC CARBOXYLIC ACIDS IN THE CONCENTRATION RANGE OF FROM ABOUT 0.5 G./L TO ABOUT 25 G./L AND (B) A SUFFICIENT AMOUNT OF AN ALKALI METAL HYDROXIDE TO BUFFER THE COMPOSITION AT A PH IN THE RANGE OF FROM 3 TO 7, ARE ADVANTAGEOUSLY USED AS A FINAL RINSE IN COLOR PHOTOGRAPHIC PROCESS TO STABILIZE THE DYE IMAGES EITHER IN THE PRESENCE OR ABSENCE OR RESIDUAL COLOR-FORMING COUPLER AGAINST THE STAINING AND/OR FADING EFFECTS OF EXPOSURE TO HIGH TEMPERATURES, HIGH HUMIDITY AND PROLONGE EXPOSURE TO LIGHT.
Inventors
- 👤 Rowland G Mowrey
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |