Multi-component powderless etching bath additive
Abstract
Abstract IMPROVED POWDERLESS ETCHING BATH ADDITIVE COMPOSITIONS, ESPECIALLY FOR ETCHING MAGNESIUM PHOTO-ENGRAVING PLATES, CONTAINING: (A) AT LEAST ONE WATER-SOLUBLE OR WATER-DISPERSIBLE SULFORRNATED FATTY ACID OF FROM 8 TO 24 CARBON ATOMS, WHEREIN THE SULFUR ATOM IN THE SULFONATE GROUP IS DIRECTLY BONDED TO A CARBON ATOM, (B) AT LEAST ONE SATURATED OR OLEFINICALLY UNSATURATED MONO-CARBOXYLIC ACID OF FROM 8 TO 24 CARBON ATOMS, (C) AT LEAST ONE LOWER MONO-CARBOXYLIC ACID OF FROM 2 TO 6 CARBON ATOMS AND/OR POLY-CARBOXYLIC ACID OF FROM 2 TO 10 CARBON ATOMS, (D) AT LEAST ONE POLYHYDRIC ALCOHOL OF FROM 2 TO 10 CARBON ATOMS OR AN ETHER DERIVATIVE THEREOF, AND (E) AT LEAST ONE ALKYLARYL SULFONATE HAVING FROM 6 TO 12 CARBON ATOMS IN THE ARYL MOIETY AND HAVING FROM 8 TO ABOUT 18 CARBON ATOMS IN EACH ALKYL MOIETY, AND ETCHING BATHS CONTAINING SUCH COMPOSITIONS AND NITRIC ACID AND WATER, GIVE OUTSTANDING ETCHING PERFORMANCE, PARTICULARLY IMPROVED DEFINITION OF THE PRINTABLE AREA OF THE PLATE, DEPTH OF THE HALF-TONES, SIDE WALL SMOOTHNESS, AND, PARTICULARLY, CONTROL OF SIDE WALL SLOPE AND SUBSTANTIAL ELIMINATION OF HOOKING AT PRING LINE POINTS.
Inventors
- 👤 H Messerschmidt
- 👤 K Montclair
- 👤 B Johnsen
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |