Defensive publication
Abstract
Abstract 5-PYRAZOLONE COLOR COUPLERS ARE INCORPORATED IN ALDEHYDE FOREHARDENED COLOR PHOTOGRAPHIC EMULSIONS AS ENOL ESTERS OF CARBOXYLIC AND SULFONIC ACIDS TO PREVENT REACTION OF 5-PYRAZOLONE WITH ALDEHYDE FOREHARDENING AGENT. A METHOD IS ALSO PROVIDED FOR THE CONVERSION OF THE ENOL ESTER TO THE FREE 5-PYRAZOLONE IN ORDER THAT IT CAN COUPLE WITH OXIDIZED COLOR DEVELOPER WHICH COMPRISES TREATING THE 5-PYRAZOLONE ENOL ESTER WITH AN ALKALINE SOLUTION CONTAINING AT LEAST ONE ORGANIC AMINE PRIOR TO OR CONCURRENT WITH COLOR DEVELOPMENT. ENOL ESTERS USEFUL WITHIN THE SCOPE OF THIS INVENTION ARE ILLUSTRATED BY THE GENERAL FORMULAE: WHEREIN R REPRESENTS HYDROGEN, ALKYL, THIOCYANO, ACYLOXY, HETEROCYCLOXY, ARYLOXY, ALKOXY, SULFO, ARYLAZO, AMINOARYLAZOXY, ARYLTRIAZOLYL, ALKYLMONOTHIO, ARYLMONOTHIO AND HETEROCYCLICMONOTHIO; R1 REPRESENTS HYDROGEN, ALKYL, ARYL AND HETEROCYCLICF R2 REPRESENTS HYDROGEN, ALKYL, ARYL, HETEROCYCLIC, AMINO, CARBONAMIDO, SULFONAMIDO, ALKYLSULFAMYL AND ALKYLCARBAMYL; R3 REPRESENTS CARBOXYLIC AND SULFONIC ACID RADICALS AND N REPRESENTS A POSITIVE INTEGER OF FROM 1 TO 8. AMINES SUITABLE FOR TREATING THE ENOL ESTERS INCLUDE HYDRAZINE, 1,1-DIMETHYLHYDRAZINE, PHENYLHYDRAZINE, PYRINDINE, IMIDAZOLE, ETHYLENEDIAMINE, TRIMETHYLAMINETRIETHYLAMINE, 2-AMINOETHANOL AND QUINUCLIDINE.
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |