US3232802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of etching and etching bath for nickel base alloys
Assignee: North American Aviation Corp
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Filing: 1963-03-11
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Granted: 1966-02-01
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Expires: 1983-03-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Samuel Young
- 👤 Jr Dominic C Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:53
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/28; C23F1/02; C23F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR ETCHING NICKEL BASE ALLOYS WHICH COMPRISES: SUBJECTING THE ALLOY TO THE ACTION OF A BATH COMPRISING: HYDROGEN ION IN A CONCENTRATION FROM 1 NORMAL TO 3.5 NORMAL, NITRATE ION IN A CONCENTRATION LESS THAN .5 NORMAL, DISSOLVED FERRIC ION IN A CONCENTRATION GREATER THAN 100 GRAMS PER LITER, DISSOLVED CHROMIUM AS CHROMIC ION IN A CONCENTRATION GREATER THAN 25 GRAMS PER LITER, A TOTAL CONCENTRATION OF OTHER DISSOLVED METALS OF LESS THAN 80 GRAMS PER LITER, SUFFICIENT HALIDE ION TO MAINTAIN BATH STOICHIOMETRY, AND AN ACID STABLE WETTING AGENT IN A CONCENTRATION FROM 0.05 PERCENT TO 0.25 PERCENT.
Claim 2
Dependent Claim
101 words
A PROCESS FOR ETCHING NICKEL BASE ALLOYS WHICH COMPRISES: SUBJECTING THE ALLOY TO THE ACTION OF A BATH COMPRISING: HYDROGEN ION IN A CONCENTRATION FROM 1 NORMAL TO 3.5 NORMAL, NITRATE ION IN A CONCENTRATION LESS THAN .5 NORMAL, DISSOLVED FERRIC ION IN A CONCENTRATION GREATER THAN 100 GRAMS PER LITER, DISSOLVED CHROMIUM AS CHROMIC ION IN A CONCENTRATION GREATER THAN 25 GRAMS PER LITER, A TOTAL CONCENTRATION OF OTHER DISSOLVED METALS OF LESS THAN 80 GRAMS PER LITER, SUFFICIENT HALIDE ION TO MAINTAIN BATH STOICHIOMETRY, AND AN ACID STABLE WETTING AGENT IN A CONCENTRATION FROM 0.05 PERCENT TO 0.25 PERCENT.
References Cited (Backward Citations)
CA513130A
Cited
CA649510A
Cited
US2613165A
Cited
US2904413A
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US3060071A
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US2955027A
Cited
US3057765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |