Patent US3234137A successfully refreshed from Google Patents.
US3234137A
Expired / Lapsed
US
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Etching bath and process for photoengraved plates
Assignee: Individual
•
Filing: 1962-10-03
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Granted: 1966-02-08
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Expires: 1982-10-03
Abstract
No abstract record available.
Inventors
- 👤 Lemaire Emile
- 👤 Lemaire Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:32
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
A METHOD FOR POSDERLESS ETCHING OF PLATES OF ZINC, MAGNESIUM AND THEIR ALLOYS WHICH COMPRISES IMPINGING AGAINST THE SURFACE OF THE PLATE, PORTIONS OF WHICH ARE PROTECTED BY A RESIST LAYER, AN ETCHING BATH COMPRISING, PER LITER OF ETCHING BATH, FROM 30 TO 300 GRAMS OF NITRIC ACIE, FROM 1 TO 25 GRAMS OF A PARTIALLY SULFATED POLYMERIZED RICINOLEIC ACID, HAVING A MOLECULAR WEIGHT OF FROM ABOUT 750 TO ABOUT 810 AND A SULFUR CONTENT AF ABOUT 2.3% FROM 10 TO 35 GRAMS OF A LIQUID HYDROCARBON, BOILING WITHIN THE RANGE OF FROM ABOUT 100*C. TO ABOUT 300*C., FROM 1 TO 5 GRAMS OF AN UNSATURATED ALIPHATIC ACID SELECTED FROM THE GROUP CONSISTING OF OLEIC ACID, LINOLEIC ACID AND PALMITOLEIC ACID AND FROM 0.02 TO 0.7 GRAM OF A WATER-SOLUBLE, NON-IONIC SURFACE ACTIVE AGENT WHICH IS A POLYETHYLENEOXY ETRHER OF AN ALKYL PHENOL HAVING FROM 4 TO 18 CARBON ATOMS IN THE ALKYL GROUP, THE RATIO OF ETHYLENE OXIDE TO ALKYL PHENOL IN THE SAID ETHER BEING FROM 4 TO 16 MOLES OF ETHYLENE OXIDE PER MOLE OF ALKYL PHENOL.
Claim 2
Independent Claim
180 words
A METHOD FOR POSDERLESS ETCHING OF PLATES OF ZINC, MAGNESIUM AND THEIR ALLOYS WHICH COMPRISES IMPINGING AGAINST THE SURFACE OF THE PLATE, PORTIONS OF WHICH ARE PROTECTED BY A RESIST LAYER, AN ETCHING BATH COMPRISING, PER LITER OF ETCHING BATH, FROM 30 TO 300 GRAMS OF NITRIC ACIE, FROM 1 TO 25 GRAMS OF A PARTIALLY SULFATED POLYMERIZED RICINOLEIC ACID, HAVING A MOLECULAR WEIGHT OF FROM ABOUT 750 TO ABOUT 810 AND A SULFUR CONTENT AF ABOUT 2.3% FROM 10 TO 35 GRAMS OF A LIQUID HYDROCARBON, BOILING WITHIN THE RANGE OF FROM ABOUT 100*C. TO ABOUT 300*C., FROM 1 TO 5 GRAMS OF AN UNSATURATED ALIPHATIC ACID SELECTED FROM THE GROUP CONSISTING OF OLEIC ACID, LINOLEIC ACID AND PALMITOLEIC ACID AND FROM 0.02 TO 0.7 GRAM OF A WATER-SOLUBLE, NON-IONIC SURFACE ACTIVE AGENT WHICH IS A POLYETHYLENEOXY ETRHER OF AN ALKYL PHENOL HAVING FROM 4 TO 18 CARBON ATOMS IN THE ALKYL GROUP, THE RATIO OF ETHYLENE OXIDE TO ALKYL PHENOL IN THE SAID ETHER BEING FROM 4 TO 16 MOLES OF ETHYLENE OXIDE PER MOLE OF ALKYL PHENOL.
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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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |