US2763536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Etching
Assignee: Dow Chemical Co
•
Filing: 1953-05-20
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Granted: 1956-09-18
•
Expires: 1973-05-20
Abstract
No abstract record available.
Inventors
- 👤 John A Easley
- 👤 Harry E Swayze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:31
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
AN ETCHING BATH COMPRISING BY WEIGHT 2 TO 14 PER CENT OF HNO3, A DIOCTYL SULFOSUCCINATE IN A PERCENTAGE CONCENTRATION OF AT LEAST 0.005 OF THAT OF THE HNO3 IN THE BATH BUT NOT IN EXCESS OF 0.10 OF THE PERCENTAGE OF THE HNO3, FROM 2 TO 15 PER CENT OF DIETHYL BENZENE, AND A WATER-DISPERSIBLE THICKENING AGENT SELECTED FROM THE GROUP CONSISTING OF THE WATER-SOLUBLE GUMS, GELATIN, DEXTRIN, AND METHYL CELLULOSE, IN A PERCENTAGE BY WEIGHT OF THE BATH AMOUNTING TO A TIMES THE RATIO OF THE PER CENT OF THE DIOCTYL SULFOSUCCINATE TO THE PER CENT OF THE HNO3 IN THE BATH, A HAVING THE FOLLOWING VALUES: BETWEEN 0.1 AND 1 FOR THE WATER-SOLUBLE GUMS, BETWEEN 0.002 AND 0.015 FOR GELATIN, BETWEEN 0.0007 AND 0.01 FOR METHYL CELLULOSE, AND BETWEEN 3 AND 7 FOR DEXTRIN.
Claim 2
Dependent Claim
137 words
AN ETCHING BATH COMPRISING BY WEIGHT 2 TO 14 PER CENT OF HNO3, A DIOCTYL SULFOSUCCINATE IN A PERCENTAGE CONCENTRATION OF AT LEAST 0.005 OF THAT OF THE HNO3 IN THE BATH BUT NOT IN EXCESS OF 0.10 OF THE PERCENTAGE OF THE HNO3, FROM 2 TO 15 PER CENT OF DIETHYL BENZENE, AND A WATER-DISPERSIBLE THICKENING AGENT SELECTED FROM THE GROUP CONSISTING OF THE WATER-SOLUBLE GUMS, GELATIN, DEXTRIN, AND METHYL CELLULOSE, IN A PERCENTAGE BY WEIGHT OF THE BATH AMOUNTING TO A TIMES THE RATIO OF THE PER CENT OF THE DIOCTYL SULFOSUCCINATE TO THE PER CENT OF THE HNO3 IN THE BATH, A HAVING THE FOLLOWING VALUES: BETWEEN 0.1 AND 1 FOR THE WATER-SOLUBLE GUMS, BETWEEN 0.002 AND 0.015 FOR GELATIN, BETWEEN 0.0007 AND 0.01 FOR METHYL CELLULOSE, AND BETWEEN 3 AND 7 FOR DEXTRIN.
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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) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |