US2981609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Etching bath for titanium and its alloys and process of etching
Assignee: RTX Corp
•
Filing: 1956-11-20
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Granted: 1961-04-25
•
Expires: 1976-11-20
Abstract
No abstract record available.
Inventors
- 👤 Walter L Acker
- 👤 Lloyd H Curkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:25
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
AN ETCHING BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF FROM 4.2% TO 6.8% BY WEIGHT OF HYDROFLUORIC ACID, FROM 9.27% TO 12.53% OF NITRIC ACID AND FROM 0.0015% TO 0.08% OF A WETTING AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM ALKYL SULFATES AND SULFATED FATTY ALCOHOLS.
Claim 2
Dependent Claim
48 words
AN ETCHING BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF FROM 4.2% TO 6.8% BY WEIGHT OF HYDROFLUORIC ACID, FROM 9.27% TO 12.53% OF NITRIC ACID AND FROM 0.0015% TO 0.08% OF A WETTING AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM ALKYL SULFATES AND SULFATED FATTY ALCOHOLS.
References Cited (Backward Citations)
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US2753337A
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US2711364A
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US2801909A
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US2847286A
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US2724667A
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US2856275A
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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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |