Defensive publication
Abstract
Abstract ADVERSE SENITOMETRIC EFFECTS RESULTING FROM CONTAMINATION OF COLOR PHOTOGRAPHIC ELEMENTS CONTAINING SILVER HALIDE EMULSION LAYERS WITH ALDEHYDE VAPOR PRIOR TO EXPOSURE AND PROCESSING CAN BE SUBSTANTIALLY REDUCED OR ELIMINATED BY INCORPORATING INTO NON-LIGHT SENSITIVE LAYERS AS ALDEHYDE SCAVENGERS CERTAIN 1,3-DISUBSTITUTED PYRAZOLONES OR BENZOYLACET-O-ALKOXYANILDES EXEMPLIFIED BY COMPOUNDS OF THE FORMULAE 1-X,3-Y,5-(O=)-2-PYRAZOLINE, OR (2-(R-O-),Y''-PHENYL)-NH- CO-CH2-CO-C6H4-X'' WHEREIN X IS AN ARYL GROUP; Y IS A CARBONAMIDO GROUP; R IS AN ALKY GROUP; EITHER ONE OF X'' OR Y'' IS DEFINED AS A HYDROGEN ATOM, THE OTHER THEN BEING DEFINED AS A SUBSTITUENT GROUP HAVING THE FORMULAE -NH-CO-A-O-R1 OR -NH-CO-R2 WHEREIN A IS A LINEAR OR BRANCHED ALKYLENE GROUP; AND R1 AND R2 ARE DEFINED AS AN ARYL GROUP. SUCH ALDEHYDE SCAVENGERS IN THE PHOTOGRAPHIC ELEMENTS REDUCE COLOR FOG ON COLOR PROCESSING.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |