Patent US3023138A successfully refreshed from Google Patents.
US3023138A
Expired / Lapsed
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Powderless etching bath and method of etching plates therewith
Assignee: Dow Chemical Co
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Filing: 1959-06-12
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Granted: 1962-02-27
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Expires: 1979-06-12
Abstract
No abstract record available.
Inventors
- 👤 John A Easley
- 👤 Marvin H Fishaber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:59
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
AN ETCHING BATH COMPRISING (A) 30 TO 200 GRAMS PER LITER OF BATH OF NITRIC ACID; (B) 3 TO 150 GRAMS PER LITER OF BATH OF A WATER-IMMISCIBLE ORGANIC FLUID SUBSTANTIALLY STABLE IN THE PRESENCE OF DILUTE NITRIC ACID; (C) 0.5 TO 20 GRAMS PER LITER OF BATH OF A SUBSTITUTED HYDROPHOBIC-HYDROPHILIC FILMING AGENT CHARACTERIZED BY THE FORMULA
Claim 2
Dependent Claim
58 words
AN ETCHING BATH COMPRISING (A) 30 TO 200 GRAMS PER LITER OF BATH OF NITRIC ACID; (B) 3 TO 150 GRAMS PER LITER OF BATH OF A WATER-IMMISCIBLE ORGANIC FLUID SUBSTANTIALLY STABLE IN THE PRESENCE OF DILUTE NITRIC ACID; (C) 0.5 TO 20 GRAMS PER LITER OF BATH OF A SUBSTITUTED HYDROPHOBIC-HYDROPHILIC FILMING AGENT CHARACTERIZED BY THE FORMULA
Claim 3
Independent Claim
99 words
A METHOD OF ETCHING THE SURFACE OF AN ACID-SOLUBLE METAL PLATE HAVING AN ACID RESISTANT PARTIAL COATING THEREON, SAID METAL BEING SELECTED FROM A GROUP CONSISTING OF ZINC, ZINC BASE ALLOYS, MAGNESIUM AND MAGNESIUM BASE ALLOYS WHICH COMPRISES IMPINGING AN ETCHING BATH UPON THE METAL SURFACE TO BE ETCHED, SUCH BATH COMPRISING (A) NITRIC ACID; (B) A WATER-IMMISCIBLE ORGANIC FLUID SUBSTANTIALLY STABLE IN THE PRESENCE OF DILUTE ACID; (C) A SUBSTITUTED HALOGENATED DIARYLOXIDE SULFONATE WHEREIN THE SUBSTITUENTS ON THE DIARYLOXIDE ARE SELECTED FROM A GROUP CONSISTING OF HYDROPHOBIC HYDROCARBONS CONTAINING FROM 1 TO 30 CARBON ATOMS; AND (D) WATER.
Claim 4
Independent Claim
99 words
A METHOD OF ETCHING THE SURFACE OF AN ACID-SOLUBLE METAL PLATE HAVING AN ACID RESISTANT PARTIAL COATING THEREON, SAID METAL BEING SELECTED FROM A GROUP CONSISTING OF ZINC, ZINC BASE ALLOYS, MAGNESIUM AND MAGNESIUM BASE ALLOYS WHICH COMPRISES IMPINGING AN ETCHING BATH UPON THE METAL SURFACE TO BE ETCHED, SUCH BATH COMPRISING (A) NITRIC ACID; (B) A WATER-IMMISCIBLE ORGANIC FLUID SUBSTANTIALLY STABLE IN THE PRESENCE OF DILUTE ACID; (C) A SUBSTITUTED HALOGENATED DIARYLOXIDE SULFONATE WHEREIN THE SUBSTITUENTS ON THE DIARYLOXIDE ARE SELECTED FROM A GROUP CONSISTING OF HYDROPHOBIC HYDROCARBONS CONTAINING FROM 1 TO 30 CARBON ATOMS; AND (D) WATER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |